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Mathematics, 20.07.2021 14:00 neariah24

1/secA-tanA - 1 /secA+tanA
So the answer comes 2tanA/sec^2 A-tan^2A
how ??.

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1/secA-tanA - 1 /secA+tanA
So the answer comes 2tanA/sec^2 A-tan^2A
how ??....

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