Find if and .

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

Problem

Find sin⁡θ\sin \theta if cos⁡θ=−45\cos \theta = -\dfrac{4}{5} and 90∘<θ<180∘90^{\circ} < \theta < 180^{\circ}.

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