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Mathematics 18 Online
OpenStudy (anonymous):

5. Prove the identity: (cot x sin x)(sec x – cos x) = sin2x

OpenStudy (anonymous):

Please simplify and explain step by step

OpenStudy (anonymous):

we know that cotx = cosx/sinx so cosx/sinx * sinx = cosx So we have cosx(secx - cosx) & we know that secx = 1/cosx so just distribute cosx to the braket , what do you get ?

OpenStudy (anonymous):

OpenStudy (anonymous):

Correct !

OpenStudy (anonymous):

yes but can you show me the calculations that go next to what I wrote?

OpenStudy (anonymous):

@tgawade

OpenStudy (anonymous):

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OpenStudy (anonymous):

Have u understood ?

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