Question

If sin a =4/5 then find cosA

need full explanation​

Answer 1

Answer:

Cos A = 5/4 Because sin is inverse of cos

Answer 2

Answer:

sin tita=O/h

by Pythagorean therom

√h square=a squre+O square

√5 square=a square+4 square

√25-16=a

√9=a

3=a

cos tita =A/H=3/5