Question

If sin theta=4/5 then find cos theta.

Answer 1

Solution:

sin theta = 4/5

cos theta = √(1-sin² theta)

= √[1-(4/5)²]

= √[1-16/25]

=√[(25-16)/25]

= √(9/25)

=3/5

Therefore,

cos theta = 3/5

••••

Answer 2

Hey !

Refer the below attachment !

Thanks !