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Choose the correct option and justify your choice : sin 2A = 2 sin A is true when A = - CBSE Class 10 - Mathematics

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Question

Choose the correct option and justify your choice :

sin 2A = 2 sin A is true when A =

  • 30°

  • 45°

  • 60°

Solution

Out of the given alternatives, only A = 0° is correct.

As sin 2A = sin 0° = 0

2 sinA = 2sin 0° = 2(0) = 0

Hence, 0° is correct.

  Is there an error in this question or solution?

APPEARS IN

 NCERT Solution for Mathematics Textbook for Class 10 (2019 to Current)
Chapter 8: Introduction to Trigonometry
Ex. 8.20 | Q: 2.3 | Page no. 187
Solution Choose the correct option and justify your choice : sin 2A = 2 sin A is true when A = Concept: Trigonometric Ratios of Some Specific Angles.
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