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0T W) + 408 WAZ = (0 सैर शक |
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Answer» According to the trigonometric identity, tan70 = tan(20+50)tan70 = (tan20+tan50)/ 1-tan20tan50tan70 - tan20tan50tan70 = tan20 + tan50 Also, tan70tan20 = tan70cot70 = 1 Hence, tan70 - tan50 = tan20 + tan50 Therefore, tan70 = tan20 + 2tan50 |
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