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प्रश्न
Prove that:
tan (55° + x) = cot (35° – x)
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उत्तर
tan (55° + x) = tan [90° – (35° – x)] = cot (35° – x)
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संबंधित प्रश्न
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`tan theta + 1/tan theta` = sec θ.cosec θ
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