GCSE Maths Practice: trigonometry

Question 8 of 10

This question asks which side is used in the numerator of sine.

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\( \begin{array}{l}\text{When using } \sin \theta,\ \text{which side is found if you rearrange for the numerator?}\end{array} \)

Choose one option:

Identify opposite side as numerator in sine formula.

When rearranging the sine formula, \(\sin \theta = \frac{\text{opposite}}{\text{hypotenuse}}\), the numerator represents the opposite side. This is critical to know when calculating missing sides or angles in right-angled triangles. Practicing labeling opposite, adjacent, and hypotenuse will help avoid mistakes. Sine applies only in triangles, so understanding which side corresponds to the numerator ensures correct application.