htoomyatnaung htoomyatnaung
  • 12-07-2020
  • English
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cosec X - sin x= cos x cotx
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Respuesta :

Hrishii
Hrishii Hrishii
  • 12-07-2020

Answer:

See Explanation

Explanation:

[tex]cosec \: x - sin \: x = cos \: x \: cot \: x \\ \\ L.H.S\\= cosec \: x - sin \: x \\ = \frac{1}{sin \: x} - sin \: x \\ \\ = \frac{1 - { \sin}^{2}x }{sin \: x} \\ \\ = \frac{ { \cos}^{2}x }{sin \: x} ...( \because \: 1 - { \sin}^{2} \theta = { \cos}^{2} \theta)\\ \\ = \frac{cos \: x \times cos \: x}{ \sin \: x} \\ \\ = \cos \: x \times \frac{\cos \: x}{ \sin \: x} \\ \\ = \cos x \: \cot x \\ = R.H.S\\ Thus \: proved \\ [/tex]

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