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What is the y-value of sin(x) when x = -90°?
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What is the y-value of sin(x) when x = -90°?

User Michal Aron
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1 Answer

2 votes
-90 degrees = 270 degrees

You can use the unit circle to find this value, if you wish.

sin(-90) = -1
User Tausif Khan
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