Evaluating Trigonometric Expressions Using a Calculator

Evaluating Trigonometric Expressions Using a Calculator

Secondary 2

Use the calculator to solve the following equations.

\(x=\sin 15.1{}^\circ \)
\(x=\cos 73.9{}^\circ \)
\(\sin x=0.688\)
\(\cos x=0.53\)

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Answer:(i) \(0.261\) (ii) \(0.277\) (iii) \(43.5^\circ\) (iv) \(58.0^\circ\)

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