Math, asked by raghvendrarajput72, 10 months ago

If sin^(4)A-cos^(4)A=1 and 0<A<=90^(@) then A=

Answers

Answered by anushkarao512

0

Answer:

answer is A=pi/2

Step-by-step explanation:

(sin^2A)^2 - (cos^2A)^2=1
(sin^2A +cos^2A)(sin^2A-cos^2A)=1
1(-cos2A)=1
cos2A=-1
2A=pi
A=pi/2

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