Question

if sin a is equal to 3 upon 5 calculate Cos A​

Answer 1

Answer: Cos A = 4/5 or -4/5

Step-by-step explanation:

sin^2 A + cos^2 A = 1

So, 9/25 + cos^2 A = 1

Cos^2 A = 16/25

Cos A = +4/5 or -4/5

Answer 2

Answer:

if sin a is equal to 3 upon 5 calculate cos A