Question

If 3 cot A = 4, check whether
1-tan^2A/1+tan^2A=cos^2A-sin^2A or not

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Answer 1

check where 1-tan^2A/1+tan^2A=cos^2A-sin^2A or not

3 cot A=4

cot A=4/3

So.

tanA =1/cot A