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Let f(x) = cos 7 x cos 3x and g(x) = si...

Let `f(x) = cos 7 x cos 3x and g(x) = sin 7 x sin 3x `
` int f(x) dx = `

A

` 1/4 sin 4x + 1/10 sin 10 x + c `

B

` 1/8 sin 4x + 1/20 sin 10x + c `

C

`1/8 sin 4x + 1/20 sin 10 x + c`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
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