PROVE: cosec ^2 x - 2 sin^2 x - cot^2 x = cos 2x please help me
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Show (sinx−cscx)2 =sin2x+cot2x− 1. Explanation: (sinx−cscx)2. =(sinx−1sinx)2. =sin2 x−2sinx(1sinx)+1sin2x. =sin2x−2+1sin2x.
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