Prove sin x + sin 3x + sin 5x + sin 7x = 4 cos x cos 2x sin 4x

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In this video, we will learn to prove the equation sin x + sin 3x + sin 5x + sin 7x = 4 cos x cos 2x sin 4x.

The link of the video explaining, the proof of the identity sin A + sin B = 2 sin((A+B)/2) cos((A-B)/2) has been given below

Other topics of this video are:
Class XI miscellaneous exercise problem 5
NCERT Class XI miscellaneous exercise problem 5

I, Ravi Ranjan Kumar Singh, have produced this video. All credits of this video belong to me.

  1. Ravi Ranjan Kumar Singh
  2. sin x sin 3x sin 5x sin 7x = 4 cos x cos 2x sin 4x
  3. Prove sin x sin 3x sin 5x sin 7x = 4 cos x cos 2x sin 4x
  4. Prove the equation sin x sin 3x sin 5x sin 7x = 4 cos x cos 2x sin 4x
  5. Class XI miscellaneous exercise problem 5
  6. NCERT Class XI miscellaneous exercise problem 5
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Sir can you use hindi language so i will saw your all videos.

punitkumar