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Rajan@2021
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Asked: 2021-04-05T18:06:22+05:30 In:

If A = 30° verify that cos 2A = (1 – tan^2A)/(1 + tan^2 A)

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

We asked to show that cos 2A = (1 – tan^2A)/(1 + tan^2 A)

RS Aggarwal, Class 10, chapter 11, question no 12(ii)

class 10 cbsers aggarwaltrigonometric ratios
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    1. Guru
      If A = 30° verify that cos 2A = (1 – tan^2A)/(1 + tan^2 A)

      Hope it helps you.

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