MathCastle
TrigonometryHard

Trigonometry · Hard problem

The angle θ\theta has tan⁡θ=−52\tan\theta=-\dfrac{\sqrt5}{2} with cos⁡θ>0\cos\theta>0. Find the exact terminal point (cos⁡θ,sin⁡θ)(\cos\theta,\sin\theta) on the unit circle.

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