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Find the value of A if tan2A=cot(A240).

Answer
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Hint: Use the information, tan2A=cot(A240) and solve carefully.

Complete step-by-step answer:
Consider the given equation, tan2A=cot(A240). We know that, tanθ=cot(90θ).

Using this formula in the given equation,
tan2A=cot(A240)cot(902A)=cot(A240)902A=A2403A=114A=38

Note: It’s always better to learn and understand the formulas. Especially in trigonometry. In trigonometry, if we talk about problem solving then formulas play a vital role in that.
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