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Find the Exact Value Of cos(u+v)\cos ( u + v )

Question 57

Multiple Choice

Find the exact value of cos(u+v) \cos ( u + v ) given that sinu=941\sin u = \frac { 9 } { 41 } and cosv=1517\cos v = - \frac { 15 } { 17 } . (Both uu and vv are in Quadrant II.)


A) cos(u+v) =225697\cos ( u + v ) = \frac { 225 } { 697 }
B) cos(u+v) =185697\cos ( u + v ) = - \frac { 185 } { 697 }
C) cos(u+v) =528697\cos ( u + v ) = \frac { 528 } { 697 }
D) cos(u+v) =519697\cos ( u + v ) = - \frac { 519 } { 697 }
E) cos(u+v) =455697\cos ( u + v ) = \frac { 455 } { 697 }

Correct Answer:

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