tan 15° + cot 15°=4 – InterviewSolution

1.	tan 15° + cot 15°=4
Answer» tan 15 + cot 15 = sin 15 / cos 15 + cos 15 / sin 15 = (sin²15 + cos²15) / (sin 15 cos 15) = 1 / (1/2 sin 30) = 2 / sin 30 = 2 / (1/2) = 4

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