First slide

Trigonometric Identities

Question

Eliminate $θ$ from $x = 1 + \tan θ, y = 2 + \cot θ$

Moderate

A

$x y + 1 = x + y$
B

$x y + 2 = 2 x + y$
C

$x y + 1 = 2 x + y$
D

$x y + 1 = 2 y + x$

Solution

$x - 1 = \tan θ, y - 2 = \cot θ$ Multiply two equations.

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