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If tan α + cot α = 2, then tan20α + cot20α = (a) 0(b) 2(c) 20(d) 220 |
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Answer» Correct answer is: (b) 2 tan α + cot α = 2 gives α=45°. So tan α = cot α = 1 tan20α + cot20α = 120 + 120 = 1+1 = 2 |
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