If for an acute angle

MATHEMATICS · Subjective · CBSE · Mathematics · Introduction to Trigonometry · Introduction to Trigonometry

Problem

If sin⁡θ=35\sin \theta = \dfrac{3}{5} for an acute angle θ\theta, find the value of cos⁡(90∘−θ)\cos(90^\circ - \theta). Give a brief reason for your answer.

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