Question

Sin^2(90°-A)+cos^2(90°-A)

Answer 1

we know that,

Sin^2(90°-A) = Cos^2 A

Cos^2(90°-A) = Sin^2 A

so, cos^2 A + Sin^2 A=1(identity)

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Answer 2

Answer:

Step-by-step explanation:

=sin^2(90-a)+cos^2(90-a)

=sin^2 a+cos^2 a                                 (since sin^2 x+cos^2 x=1)

=1