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Trigonometrical Ratios of Standard Angles — MATHEMATICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9MATHEMATICSTrigonometrical Ratios of Standard Angles3 Marks
Question
Solve for ' $\theta$ ': $\sin \frac{\theta}{3}=1$
✓

Answer

$ \sin \frac{\theta}{3}=1$
$ \Rightarrow \sin \frac{\theta}{3}=\sin 90^{\circ}$
$ \Rightarrow \frac{\theta}{3}=90^{\circ}$
$ \Rightarrow \theta=270^{\circ} .$

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