Evaluate \(\int_7^9\)cos(x)dx.

(a) 8 (-sin 9 – sin 7)

(b) 8 (sin 9 + sin 7)

(c) 8 (sin 9 – sin 7)

(d) 7 (sin 9 – sin 7)

I had been asked this question by my college director while I was bunking the class.

This question is from Definite Integral topic in portion Integrals of Mathematics – Class 12

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