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cos(sin^-1 3/5+sin^-1 5/13) |
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Answer» sin^-1 (3/5) + sin^-1 (5/13) = sin^-1 (3/5 * 12/13 + 5/13* 4/5) = sin^-1 (56/65) = cos^-1(33/65) Now cos (cos^-1 33/65) = 33/65 |
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