SOLUTION: find sin(x+y) if sin x=2/3 and sin y= -1/3

SOLUTION: find sin(x+y) if sin x=2/3 and sin y= -1/3

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Question 958282: find sin(x+y) if sin x=2/3 and sin y= -1/3
Answer by jsmallt9(3758) (Show Source): You can put this solution on YOUR website!
This problem cannot be solved without additional information. This is so because

To find sin(x+y) we will use the identity:
sin(x+y) = sin(x)cos(y) + cos(x)sin(y)
The identity requires cos(x) and cos(y).
But without information telling us the quadrant in which x and y terminate, we cannot find these cos's.

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