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Find the angle θ in the following, if 0° < θ < 90°. sin θ = cos 75° - Mathematics

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Question

Find the angle θ in the following, if 0° < θ < 90°.

sin θ = cos 75°

Sum
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Solution

sin θ = cos (90∘ − θ)

sin θ = cos 75∘

θ = 90° − 75° = 15°

15°

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Chapter 19: Trigonometry - EXERCISE 19B [Page 233]

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B Nirmala Shastry Mathematics [English] Class 9 ICSE
Chapter 19 Trigonometry
EXERCISE 19B | Q I. 1. | Page 233
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