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Mathematics, 25.02.2021 07:20 rclara34oxbrr9
(1+\tan ^(2)x+\sec ^(2)x\cot ^(2)x)/(\csc ^(2)x+\cot ^(2)x\csc ^(2)x)=\tan ^(2)x
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(1+\tan ^(2)x+\sec ^(2)x\cot ^(2)x)/(\csc ^(2)x+\cot ^(2)x\csc ^(2)x)=\tan ^(2)x...
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