Trigonometry Basics (VCE SSCE General Mathematics): Quizzes

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Trigonometry basics
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Which side of a right-angled triangle is always the longest and opposite the right angle?

Hypotenuse

Which sides of a right-angled triangle change labels when θ\theta moves to a different corner?

Opposite and adjacent

What is the formula for sin⁡θ\sin \theta in a right-angled triangle?

oh\frac{o}{h}

What is the formula for cos⁡θ\cos \theta in a right-angled triangle?

ah\frac{a}{h}

What is the formula for tan⁡θ\tan \theta in a right-angled triangle?

oa\frac{o}{a}

In SOH-CAH-TOA, what does CAH stand for?

Cosine = Adjacent/Hypotenuse

What does sin⁡30°=0.5\sin 30° = 0.5 tell us about all right-angled triangles with a 30°30° angle?

Ratio opposite/hypotenuse is always 0.50.5

Why do trigonometric ratios stay constant for a given angle in different-sized triangles?

Ratios depend only on angle, not size

What mode must your calculator be in before calculating trigonometric values?

DEGREE mode

Which side lies next to angle θ\theta and forms one of its arms (but isn't the hypotenuse)?

Adjacent side

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