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## Homework Statement

Which of the following is not a possible solution of

0=sinθ+cosθtan^2θ?

A. 3pi/4

B. 7pi/4

C. 2pi

D. 5pi/2

## Homework Equations

All trigonometric identities.

## The Attempt at a Solution

Too much to write down, at least two pages long, but I've been trying to rewrite the equation so that there's only one trigonometric function left. I would really like a push in the right direction.