1.

Value of the integral `int _(-pi//2)^(pi//2) cos x dx ` isA. 4B. 2C. 0D. 1

Answer» Correct Answer - B
Let `l = int _(-pi//2)^(pi//2) cos x dx `
Since, `cos (-x) = cos x`
` :. L = 2 int _(0)^(pi//2) cos x dx = 2 [ sin x ] _(0)^(pi//2) =2`


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