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1 - Tan^2 A)/ 1 + tan^2 A
1 - sin^2/cos^2 )/ 1 + sin^2/cos^2
cos^2 - sin^2)/ cos^2 + sin^2
As cos^2 + sin^2 = 1
So
cos^2 A - sin^2 A
1 - sin^2/cos^2 )/ 1 + sin^2/cos^2
cos^2 - sin^2)/ cos^2 + sin^2
As cos^2 + sin^2 = 1
So
cos^2 A - sin^2 A
aastha4865:
okk....❤
but why? u delete her answer
okkk....now it is clear to me
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