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\frac{\sin ^{2} 20+\sin ^{2} 70}{\sec ^{2} 50-\cot ^{2} 40}+2 \csc ^{2} 58-2 \cot 58 \tan 32-4 \tan 13 \tan 37 \tan 45 \tan 53 \tan 77 |
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Answer» page 1. page 2. |
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