Question

Please help me to solve this example

Answer 1

Answer:

Step-by-step explanation:

cos^2x=sin^2x-1/5

cos x=root of (sin^2x-1/5)

=root of (sin^2x -1/root of 5^2)

=(sinx +1/root 5)(sinx -1/root5)

• plss mark brainleist