Trigonometry - Trigonometric Equations

Trigonometry - Trigonometric Equations

TGM Original Questions

Solve each of the following equations.

\(\cos 2x = -0.4127\) , \(-\pi \leq x \leq \pi\)
\(\sin 2x = -0.2215\) , \(-\pi \leq x \leq \pi\)

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Answer:(i) x = -2.14, -0.998, 0.998, 2.14 rad; (ii) x = -1.46, -0.112, 1.68, 3.03 rad

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