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OpenStudy (anonymous):
find the exact value of the trigonometric function, cos(u+v), given that sinu=5/13 and cos=-3/5
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OpenStudy (anonymous):
that is supposed to be cosu
OpenStudy (fibonaccichick666):
are we given any info about v?
OpenStudy (fibonaccichick666):
like is that supposed to say sinv?
OpenStudy (anonymous):
no
OpenStudy (fibonaccichick666):
then unfortunately, I don't think this problem is doable
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OpenStudy (anonymous):
it is. i got an ugly fraction when i solved it, so i dont know if it is right
OpenStudy (fibonaccichick666):
no clue how you did it without any info on v
OpenStudy (anonymous):
that supposed to be cosv. its in fancy font
OpenStudy (fibonaccichick666):
That makes this doable, so first, draw 2 triangles and label the sides, u, and v
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