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Maharashtra State BoardSSC (English Medium) 9th Standard

Cos 40° = sin ______° - Geometry

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Question

cos 40° = sin ______°

Fill in the Blanks
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Solution

cos 40° = sin 50°  

Explanation:

cos 40° = sin (90° - 40°) = sin 50°        ...[cosθ = sin (90° - θ)]

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Chapter 8: Trigonometry - Problem Set 8 [Page 113]

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Balbharati Mathematics 2 [English] Standard 9 Maharashtra State Board
Chapter 8 Trigonometry
Problem Set 8 | Q 5. (iii) | Page 113
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