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Question

Simplify:
x22xsec2x+1

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Solution

Now,
x22xsec2x+1
=x22xsec2x+(sec2xtan2x) [ sec2xtan2x=1]
=x22xsec2x+sec2xtan2x
=(xsecx)2tan2x
=(xsecxtanx)(xsecx+tanx).

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