In a right-angled triangle, the hypotenuse is 12 cm and one angle is . What is the length of the side opposite the angle, to 3 significant figures?
Answer and explanation
Correct answer: A. 6.88 cm
- Step 1: The opposite side and hypotenuse are linked by sine: .
- Step 2: .
Answer
6.88 cm.
Why not the others: 9.83 cm uses cosine (the adjacent side), 8.40 cm uses tangent with the hypotenuse and 20.9 cm divides by sine instead of multiplying.
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