Question

sin A =3/5 find 5cos A​

Answer 1

Answer:

given sinA = 3/5

We know sin²A + Cos²A =1

so (3/5)²+Cos²A =1

9/25+Cos²A =1

Cos²A = 1- 9/25 = 16 /25

so Cos A = √16/25 = 4/5 ans.