Question

if sin a + sin^2 a =1 then evaluate cos^2a + cos^4a​

Answer 1

answer:

we know that

sin²a+cos²a=1

sin²+sin²a=1

sina+1-cos²a=1

sina=cos²a (1)

square both side

sin²a=cos⁴a

1-cos²a=cos⁴a

1=cos²a+cos⁴a

so

cos⁴a+cos²a=1

hope it is helpful

30 ❤ please

Answer 2

Step-by-step explanation:

I hope that it is helpful to you