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How to tell if the sine, cosine and tangent of a angle are negative or positive?

User LucasRolff
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hello :
1 ) the 1 quadrant : the sine, cosine and tangent are positives
2) the 2 quadrant : the sine is positive but cosine and tangent are negatives
3 ) the 3 quadrant : the tangent is positive but cosine and sine are negatives
4 ) the 4 quadrant : the cosine is positive but tangent and sine are negatives
User T Porter
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