Answer to Question #244737 in Trigonometry for Carmen

Question #244737

If θ\theta is an angle in the third quadrant, in which quadrant does the point (sinθ\theta cosθ\theta , sinθ\theta +cosθ\theta ) lie?


1
Expert's answer
2021-10-01T00:01:20-0400

Given that θ\theta is in the third quadrant.

sinθ\therefore sin\theta is negative and cosθcos\theta is also negative.

So, sinθ.cosθsin\theta.cos\theta is positive and sinθ+cosθsin\theta+cos\theta is negative.

xcoordinate\therefore x-coordinate is positive and ycoordinatey-coordinate is negative.

So, (sinθ\theta cosθ\theta , sinθ\theta +cosθ\theta ) lies in fourth quadrant.


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