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OpenStudy (xenesis98):
Win a medal !! If tan theta = 12/5 and cos theta < 0, what is sin theta ? a.12 b.5/13 c.-5/13 d.12/13 e.-12/13
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OpenStudy (welshfella):
tan theta is positive and cos theta is negative so the angle is in the thrid quadrant
OpenStudy (welshfella):
|dw:1461615944183:dw|
OpenStudy (welshfella):
use the pythagoras theorem to find the length of the hypotenuse sin theta = opposite / hypotenuse
OpenStudy (welshfella):
hypotenuse = sqrt (5^2 + 12^2) = sqrt 169 = 13
OpenStudy (welshfella):
OK?
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OpenStudy (xenesis98):
oh ok
OpenStudy (xenesis98):
but which is the opp
OpenStudy (welshfella):
|dw:1461616254150:dw|
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