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Problem 944
(difficulty: 4/10)
\(\displaystyle \int_0^{2\pi} {1\over 2+\cos x}\dx =? \)
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Real Analysis 1-4 / Fundaments of Logic (16 problems)
Real Analysis 1-4 / Proving Techniques: Proof by Contradiction, Induction (26 problems)
Real Analysis 1-4 / Fibonacci Numbers (6 problems)
Real Analysis 1-4 / Solving Inequalities and Optimization Problems by Inequalities between Means (19 problems)
Real Analysis 1-4 / Sets, Functions, Combinatorics (22 problems)
Real Analysis 1-4 / Axioms of the real numbers (43 problems)
Real Analysis 1-4 / Field Axioms (5 problems)
Real Analysis 1-4 / Ordering Axioms (6 problems)
Real Analysis 1-4 / The Archimedean Axiom (3 problems)
Real Analysis 1-4 / Cantor Axiom (7 problems)
Real Analysis 1-4 / The Real Line, Intervals (15 problems)
Real Analysis 1-4 / Completeness Theorem, Connectivity, Topology of the Real Line. (4 problems)
Real Analysis 1-4 / Powers (3 problems)
Real Analysis 1-4 / Convergence of Sequences (191 problems)
Real Analysis 1-4 / Theoretical Exercises (61 problems)
Real Analysis 1-4 / Order of Sequences, Threshold Index (22 problems)
Real Analysis 1-4 / Limit Points, liminf, limsup (15 problems)
Real Analysis 1-4 / Calculating the Limit of Sequences (33 problems)
Real Analysis 1-4 / Recursively Defined Sequences (21 problems)
Real Analysis 1-4 / The Number $e$ (13 problems)
Real Analysis 1-4 / Bolzano–Weierstrass Theorem and Cauchy Criterion (5 problems)
Real Analysis 1-4 / Infinite Sums: Introduction (21 problems)
Real Analysis 1-4 / Cardinalities of Sets (6 problems)
Real Analysis 1-4 / Countable and not countable sets (6 problems)
Real Analysis 1-4 / Limit and Continuity of Real Functions (105 problems)
Real Analysis 1-4 / Global Properties of Real Functions (20 problems)
Real Analysis 1-4 / Continuity and Limits of Functions (33 problems)
Real Analysis 1-4 / Calculating Limits of Functions (29 problems)
Real Analysis 1-4 / Continuous Functions on a Closed Bounded Interval (9 problems)
Real Analysis 1-4 / Uniformly Continuous Functions (5 problems)
Real Analysis 1-4 / Monotonity and Continuity (2 problems)
Real Analysis 1-4 / Convexity and Continuity (7 problems)
Real Analysis 1-4 / Elementary functions (21 problems)
Real Analysis 1-4 / Exponential, Logarithm, and Power Functions (17 problems)
Real Analysis 1-4 / Inequalities (1 problems)
Real Analysis 1-4 / Trigonometric Functions and their Inverses (3 problems)
Real Analysis 1-4 / Differential Calculus and its Applications (144 problems)
Real Analysis 1-4 / The Notion of Differentiation (47 problems)
Real Analysis 1-4 / Tangents (11 problems)
Real Analysis 1-4 / Higher Order Derivatives (13 problems)
Real Analysis 1-4 / Local Properties and the Derivative (4 problems)
Real Analysis 1-4 / Mean Value Theorems (3 problems)
Real Analysis 1-4 / Number of Roots (5 problems)
Real Analysis 1-4 / Exercises for Extremal Values (16 problems)
Real Analysis 1-4 / Inequalities, Estimates (14 problems)
Real Analysis 1-4 / The L'Hospital Rule (14 problems)
Real Analysis 1-4 / Polynomial Approximation, Taylor Polynomial (20 problems)
Real Analysis 1-4 / Convexity (5 problems)
Real Analysis 1-4 / Analysis of Differentiable Functions (6 problems)
Real Analysis 1-4 / Riemann Integral (58 problems)
Real Analysis 1-4 / Definite Integral (11 problems)
Real Analysis 1-4 / Indefinite Integral (13 problems)
Real Analysis 1-4 / Properties of the Derivative (2 problems)
Real Analysis 1-4 / Newton-Leibniz formula (2 problems)
Real Analysis 1-4 / Integral Calculus (5 problems)
Real Analysis 1-4 / Applications of the Integral Calculus (7 problems)
Real Analysis 1-4 / Calculating the Arclength (3 problems)
Real Analysis 1-4 / Integral and Inequalities (5 problems)
Real Analysis 1-4 / Improper Integral (9 problems)
Real Analysis 1-4 / Functions of Bounded Variation (2 problems)
Real Analysis 1-4 / Riemann-Stieltjes integral (2 problems)
Real Analysis 1-4 / Infinite Series (38 problems)
Real Analysis 1-4 / Sequences and Series of Functions (45 problems)
Real Analysis 1-4 / Convergence of Dequences of Functions (16 problems)
Real Analysis 1-4 / Convergence of Series of Functions (17 problems)
Real Analysis 1-4 / Taylor and Power Series (12 problems)
Real Analysis 1-4 / Differentiability in Higher Dimensions (121 problems)
Real Analysis 1-4 / Topology of the $n$-dimensional Space (29 problems)
Real Analysis 1-4 / Real Valued Functions of Several Variables (78 problems)
Real Analysis 1-4 / Limits and Continuity in $R^n$ (16 problems)
Real Analysis 1-4 / Differentiation in $R^n$ (62 problems)
Real Analysis 1-4 / Vector Valued Functions of Several Variables (14 problems)
Real Analysis 1-4 / Limit and Continuity (3 problems)
Real Analysis 1-4 / Differentiation (11 problems)
Real Analysis 1-4 / Jordan Measure and Riemann Integral in Higher Dimensions (60 problems)
Real Analysis 1-4 / Integral Theorems of Vector Calculus (44 problems)
Real Analysis 1-4 / The Line Integral (11 problems)
Real Analysis 1-4 / Newton-Leibniz Formula (6 problems)
Real Analysis 1-4 / Existence of the Primitive Function (13 problems)
Real Analysis 1-4 / Integral Theorems in 2D (2 problems)
Real Analysis 1-4 / Integral Theorems in 3D (12 problems)
Real Analysis 1-4 / Measure Theory (46 problems)
Real Analysis 1-4 / Set Algebras (9 problems)
Real Analysis 1-4 / Measures and Outer Measures (8 problems)
Real Analysis 1-4 / Measurable Functions. Integral (10 problems)
Real Analysis 1-4 / Integrating Sequences and Series of Functions (11 problems)
Real Analysis 1-4 / Fubini Theorem (1 problems)
Real Analysis 1-4 / Differentiation (7 problems)
Complex Analysis / Complex differentiability (22 problems)
Complex Analysis / Complex numbers (22 problems)
Complex Analysis / The Riemann sphere (1 problems)
Complex Analysis / Regular functions (42 problems)
Complex Analysis / Complex differentiability (7 problems)
Complex Analysis / The Cauchy-Riemann equations (3 problems)
Complex Analysis / Power series (12 problems)
Complex Analysis / Domain of convergence (9 problems)
Complex Analysis / Regularity of power series (2 problems)
Complex Analysis / Taylor series (1 problems)
Complex Analysis / Elementary functions (20 problems)
Complex Analysis / The complex exponential and trigonometric functions (8 problems)
Complex Analysis / Complex logarithm (12 problems)
Complex Analysis / Complex Line Integral and Applications (57 problems)
Complex Analysis / The complex line integral (9 problems)
Complex Analysis / Cauchy's theorem (6 problems)
Complex Analysis / The Cauchy formula (12 problems)
Complex Analysis / Power and Laurent series expansions (9 problems)
Complex Analysis / Power series expansion (2 problems)
Complex Analysis / Liouville's Theorem (7 problems)
Complex Analysis / Consequences of analyticity (12 problems)
Complex Analysis / The maximum principle (4 problems)
Complex Analysis / Laurent series (9 problems)
Complex Analysis / Isolated singularities (65 problems)
Complex Analysis / Singularities (4 problems)
Complex Analysis / Cauchy's theorem on residues (61 problems)
Complex Analysis / Residue calculus (6 problems)
Complex Analysis / Applications (33 problems)
Complex Analysis / Evaluation of series (7 problems)
Complex Analysis / Evaluation of integrals (26 problems)
Complex Analysis / The argument principle and Rouche's theorem (7 problems)
Complex Analysis / Conformal maps (47 problems)
Complex Analysis / Fractional linear transformations (20 problems)
Complex Analysis / Riemann mapping theorem (11 problems)
Complex Analysis / Schwarz lemma (12 problems)
Complex Analysis / Caratheodory's theorem (2 problems)
Complex Analysis / Schwarz reflection principle (2 problems)
Complex Analysis / Harmonic functions (8 problems)
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