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Tangent Half-Angle Substitution
## Formula
If:
$$t=\tan\frac x2$$
then:
$$\sin x=\frac{2t}{1+t^2}$$
## Usage
- Used to transform trigonometric expressions into rational algebraic expressions.
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Tangent Half-Angle Substitution
## Formula
If:
$$t=\tan\frac x2$$
then:
$$\sin x=\frac{2t}{1+t^2}$$
## Usage
- Used to transform trigonometric expressions into rational algebraic expressions.
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