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Angle Between Two Lines Using Direction Vectors
For direction vectors $$\vec d_1$$ and $$\vec d_2$$:
$$\cos\theta=\frac{|\vec d_1\cdot\vec d_2|}{|\vec d_1||\vec d_2|}$$
Usage
- Used when vector equations of two lines are given.
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Angle Between Two Lines Using Direction Vectors
For direction vectors $$\vec d_1$$ and $$\vec d_2$$:
$$\cos\theta=\frac{|\vec d_1\cdot\vec d_2|}{|\vec d_1||\vec d_2|}$$
Usage
- Used when vector equations of two lines are given.
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