Find the point on the terminal side of θ = -3pi/4 that has an x coordinate of -1. Show your work for full credit.

Question

amistre64 · Answer

id start with drawing a circle about the origin and marking the angle in it

amistre64 · Answer

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amistre64 · Answer

then its just a matter of determining the "height" of the triangle usiing basic trig functions

anonymous · Answer

I have to explain it in words Im not sure how I would say it @amistre64  help with the wording?

amistre64 · Answer

me no goodest with splaining in words :/

amistre64 · Answer

the three posts i gave is prolly the best i can do with using words ... good luck tho

anonymous · Answer

Well can you help me take a guess So can I say for the equation θ = -3pi/4 the poing that has a an x coordinate of -1 would be 1/4 ? @amistre64

amistre64 · Answer

no, the point would be defined as (-1,y)

saying:   the point that has a an x coordinate of -1 would be 1/4 is meaningless.

the reference angle we have is pi/4

the tangent of that angle equals y/x, tan(a) = y/x

solving for y gets us:  x tan(a) = y , and since the angle ends up in the 3rd quadrant we will have a negative x and a negative y

anonymous · Answer

Thank you @amistre64