Question

It Sin Q = 3 /5 , then find cos Q=?
[using
formula sin square Q + cos square Q = 1​

Answer 1

Answer:

We have

sinQ=3/5

We know that

sin²Q+cos²Q=1

(3/5)²+cos²Q=1

9/25+cos²Q=1

cos²Q=1-9/25

cos²Q=25-9/25

cos²Q=16/25

cosQ=4/5