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Evaluate a trigonometric ratio, and find an angle from its value

DIFFICULTYchallenge
QUESTION TYPEMix of allChange
Acute inverse sinAcute inverse cosAcute inverse tanNOWMix of allRecommended
Question 1 of 8

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Use degree mode. The angle is acute: \(0^{\circ}<\theta<90^{\circ}\)

1 mark
\[\cos \theta=0.8643\]

Find \(\theta\) to 1 decimal place

Format: 1 d.p.