Question

if sin A=3/4 calculate cos A and tan A

Answer 1

cosA =√(1-sin^2(A))
= √(1-9/16)
= √(7/16)
= (√7)/4 [Answer-I]
tanA = sinA/cosA
= (3/4)÷((√7)/4)
= 3/√7 [Answer-II]

Answer 2

Hope it helps u.....