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Flashcards Mathematics Year 10

Trigonometric Ratios

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What is the value of $$\cos(60°)$$?
The value of $$\cos(60°)$$ is $$\frac{1}{2}$$.
What is the tangent ratio in a right triangle?
The tangent ratio is defined as the ratio of the length of the opposite side to the length of the adjacent side: $$\tan(\theta) = \frac{\text{opposite}}{\text{adjacent}}$$
How can you find the angle if you know the opposite and adjacent sides?
Use the tangent function: $$\theta = \tan^{-1}\left(\frac{\text{opposite}}{\text{adjacent}}\right)$$
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