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1/ 0८2' 05 20" + ८. |
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Answer» (cos^2 20 + cos^2 70) + cot 25/tan 65 + cot 5 cot 10 cot 60 cot 80 cot 85 = (sin^2 (90-20) + cos^2 70) + tan(90-25)/tan 65 + tan(90-5) tan (90-10) cot 60 cot 80 cot 85 = (sin^2 70 + cos^2 70) + tan 65/tan 65 + tan 85 tan 80 cot 60 1/tan 80 1/tan 85 = 1 + 1 + cot 60 = 2 + 1/sqrt(3) |
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