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Without using trigonometric tables, evaluatesin39°cos51 |
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Answer» =sin39/cos51 + 2tan11tan31tan45tan59tan79 - 3(sin^221+ sin^269) =1 + 2cot79cot59tan45tan59tan79 - 3(sin^221 + cos^221) (sin teeta = cos(90 - teeta)) (tana a = 1/cota) =1 + 2 - 3 =0 than1 |
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