class 10 trigonometry problem maths.
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= {(sin +cos)^2- 1}× sec ×cosec
= {(sin^2+cos^2+2sin×cos)-1}×sec×cosec
= (1 + 2sic×cos - 1)×(1/(sin×cos))
= 2 sin×cos÷(sin×cos)
=2
hence proved
= {(sin^2+cos^2+2sin×cos)-1}×sec×cosec
= (1 + 2sic×cos - 1)×(1/(sin×cos))
= 2 sin×cos÷(sin×cos)
=2
hence proved
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