Tan ^2 theta -1/cos^2 theta +1 =0 prove that
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Answer:
tan^2A-1/cos^2A+1=0
we let theta =A
because
theta likha nahi so
tan^2A-1/cos^2A+1
tan^2A -sec^2A+1
tan^2 A-(1+tan^2A)+1
tan^2A-1-tan^2A+1
=0 Ans
proved
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