Question

if cos A +cos²A=1,then the value of sin²A +sin⁴ A is​

Answer 1

Answer:

cosA+cos2A=1

Step-by-step explanation:

cosA=1-cos2A, then. sin2A=cosA,. sin2A+sin4A=cosA+cos2A,.= 1

Answer 2

Answer:

1

Step-by-step explanation:

cos A + cos^2 A =1

cos A +1-sin^2 A =1

Cos A - sin^2 A =0

cos A = sin^2 A

sin^2 A +sin^4 A =cos A+ cos^2 A

= 1