Answered

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Find the missing coordinate.
x = cos t
y = sin t
(-1, [?])

Sagot :

Nimbus2005
You can base this on the unit circle. When x or cos is -1 on the unit circle, y or sin is 0. Since there are no factors changing sine or cosine, they have to be on the unit circle, so we know that sin has to be the 0 corresponding with cos=-1.
View image Nimbus2005
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