1.

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)
Answer» D. 7 (sin 9 sin 7)


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