Question

cosx=5/13 and sin y=3/5 what is the exact value of sin x?

Answer 1

sin x = 12/13

Answer 2

one more method to do it is to keep in mind the identity
\[\cos ^{2}x+\sin ^{2}x =1 \]

Answer 3

so (5/13)^2 + sin^2x = 1
sin^2x = 1-25/169 = 144/169
so sin x = sqrt (144/169) = 12/13

Answer 4

so what was sin y for?

Answer 5

for nothing? lol