I dont understand one bit how to do this, someone please help.

Find the point on the terminal side of θ =-3pi/4 that has an x coordinate of -1

Question

I dont understand one bit how to do this, someone please help.

 Find the point on the terminal side of θ =-3pi/4  that has an x coordinate of -1

amistre64 · Answer

maybe something along these lines

arccos(-3pi/4) = x = -1
arcsin(-3pi/4) = y

amistre64 · Answer

might have to introduce a scalar tho

amistre64 · Answer

k arccos(-3pi/4) = -1
k arcsin(-3pi/4) = y

anonymous · Answer

Can you please explain to me the steps i really want to understand how this is done.

amistre64 · Answer

you are given an angle.  that angle is associated with some cosine and sine value.

the cosine value relates to x
the sine value relates to y

so find those values we would use the inverse functions for them

anonymous · Answer

ok..

amistre64 · Answer

and since they are most likely not on the unit circle, it would have to be some scalar version of them

amistre64 · Answer

another way to approach this is to recognise the pi/4 is 45 degrees; and that -3pi/4 gets us into the left bottom quadrant.

anonymous · Answer

scalar?

anonymous · Answer

oh ok

amistre64 · Answer

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