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Find a side using trigonometry
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Learn it Pick the ratio that uses the side you know and the side you want. Write the equation, then multiply or divide to find the unknown.
Example: Hypotenuse 10, θ = 35°. Find the opposite side.
- Opposite and hypotenuse → sin.
- $\sin 35^\circ = \frac{x}{10}$.
- $x = 10 \sin 35^\circ \approx 5.7$.
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