Question

3. If 3cos 2 A + 7sin 2 A = 4 , show that cotA = √3​

Answer 1

Answer:

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Answer 2

Answer:

Given 7sin^2A+3cos^2A=4 =>7sin^2A+3cos^2A=4(sin^2A+cos^2A) =>3sin^2A=cos^2A =>sin^2A/cos^2A=1/3 =>tan^2A=1/3 =>tanA=1/√3

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