Question

Find sine and cosine if angle C please

Answer 1

Answer: sin=7/13,cos=2.sqrt30/13

Explanation:

SOH COH TOA

sin=opp/hyp,cos=adj/hyp

Use pyth. theorem to find the adjacent of C.

13^2 =7^ + b^2

169 = 49 + b^2

120 = b^2

sqrt120 = sqrtb

2.sqrt30 = b is the missing side.