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verify the identity... secx-cosx+(tanx/cscx)= 2sinxtanx
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To start you off, what is equivalent to tanx and cscx?
sinx/cosx and 1/sinx
right. Now what is secx equivalent to?
(sinx/cosx) divided by (1/sinx) is (sinx)^2 / cosx
Once you know what secx is equivalent to, find the common denominator between everything and you will get your answer.
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