allery∫₀^(2π) cos x dx equals:
A-2π
B2
C0
D2π
Answer & Solution
Correct answer: C. 0
∫₀^(2π) cos x dx = [sin x]₀^(2π) = sin(2π) - sin(0) = 0 - 0 = 0. Cosine integrated over a full period equals zero.
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