Solving expressions using 45-45-90 special right triangles

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Intros

Lessons

What are special triangles?

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Examples

Lessons

If $\theta = 45^\circ$ $θ = 4 5^{\circ}$ , find the exact value of following expressions.
1. $3 \sin^2 \theta$
2. $\tan (3 \theta - 75^\circ)$
3. $\cos^2(120^\circ - 2 \theta)$

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