Math
posted by Hannah .
Find the exact value of the trigonometric function given that
sin u = 5/13 and cos = 3/5
1) sin(uv)
My teacher said to make two right triangles and then find the missing parts by the pyth theorem.
For the 5/13 triangle I got 12 and the other triangle I got 4. I do not know what to do now.

Nevermind
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