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Evaluate the Integral cos6xcos4xdx\int \cos 6 x \cos 4 x d x

Question 109

Multiple Choice

Evaluate the integral.
- cos6xcos4xdx\int \cos 6 x \cos 4 x d x


A) 14sin2x+120sin10x+C\frac { 1 } { 4 } \sin 2 x + \frac { 1 } { 20 } \sin 10 x + C
B) 14sin2x120sin10x+C\frac { 1 } { 4 } \sin 2 x - \frac { 1 } { 20 } \sin 10 x + C
C) 14sin6x+120sin4x+C\frac { 1 } { 4 } \sin 6 x + \frac { 1 } { 20 } \sin 4 x + C
D) 14cos2x+120cos10x+C\frac { 1 } { 4 } \cos 2 x + \frac { 1 } { 20 } \cos 10 x + C

Correct Answer:

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