Find the angles on the unit circle

MATHEMATICS · Multi-part · CBSE · Mathematics · Trigonometric Functions · Trigonometric Functions

Problem

Find the angles θ\theta on the unit circle, with 0≤θ≤2π0\le\theta\le2\pi, such that: (a) cos⁡θ=−14\cos\theta=-\frac{1}{4} (b) sin⁡θ=0\sin\theta=0 (c) tan⁡θ=−3.1\tan\theta=-3.1 (d) sin⁡θ=−0.421\sin\theta=-0.421 (e) tan⁡θ=1.2\tan\theta=1.2 (f) cos⁡θ=0.7816\cos\theta=0.7816 (g) sin⁡θ=111\sin\theta=\frac{1}{11} (h) cos⁡θ=−13\cos\theta=-\frac{1}{\sqrt{3}}

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