sin(1+tan)+cos(1+cot)=sec+cosec
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LHS
sin(1+tan)+cos(1+cot)
Sin + tan *sin + cos + cos*cot
sin + sin^2/cos + cos + cos^2/sin
sin +cos^2/sin + sin^2/cos + cos
(sin^2 + cos^2)/sin + (sin^2 + cos^2)/cos
1/sin + 1/cos
cosec + sec
RHS
hence proved
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