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Rajan@2021
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Asked: 2021-04-05T18:15:14+05:30 In:

If A = 60° and B = 30° verify that cos(A+B) = cos A cos B – sin A Sin B

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This is the basic and conceptual question from trigonometric ratios in which we have given A = 60° and B = 30°

We asked to prove that cos(A+B) = cosA cosB – sinA SinB

RS Aggarwal, Class 10, chapter 11, question no 14(ii).

 

class 10 cbsers aggarwaltrigonometric ratios
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    1. Guru
      If A = 60° and B = 30° verify that cos(A+B) = cos A cos B – sin A Sin B

      Hope it helps you.

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