Question

if sinA +sin ^2A=1 prove that cosA^2+cosA^4=1​

Answer 1

Step-by-step explanation:

Here is your answer for to question

Answer 2

Answer:

sinA+sin²A=1 - (i) (Given)

= sinA=1-sin²A

= sinA=cos²A - (ii) (1-sin²A=cos²A)

sinA+sin²A=1 (from eq. (i))

=cos²A+(cos²A)²=1

=cos²A+cos⁴A=1

Hence, Proved.

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