Question: a. Show that f(x) = cos 2x + 6. b. Hence, find the exact value of 0 /4 f(x) dx. f(x) = 5 sin

a. Show that f(x) = cos 2x + 6.

b. Hence, find the exact value of ∫0π/4 f(x) dx.

f(x) = 5 sin2 x + 7 cos2 x

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