Tangent in Terms of Eccentric Angle

Rarely Tested

Tangent in Terms of Eccentric Angle

At:

$$P(a\cos\theta,b\sin\theta)$$

the tangent is:

$$\frac{x\cos\theta}{a}+\frac{y\sin\theta}{b}=1$$

Usage

- Used to obtain the tangent directly from the eccentric angle.

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