Question

find the exact value of the trigonometric function, cos(u+v), given that sinu=5/13 and cos=-3/5

Answer 1

that is supposed to be cosu

Answer 2

are we given any info about v?

Answer 3

like is that supposed to say sinv?

Answer 4

no

Answer 5

then unfortunately, I don't think this problem is doable

Answer 6

it is. i got an ugly fraction when i solved it, so i dont know if it is right

Answer 7

no clue how you did it without any info on v

Answer 8

that supposed to be cosv. its in fancy font

Answer 9

That makes this doable, so first, draw 2 triangles and label the sides, u, and v