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Suppose a triangle has side length a, b, and c. and let theta be the angle opposite of b, if cos theta >0 what must be true?
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jim_thompson5910 can you help?
@jim_thompson5910
cos theta = 0 at 90 degrees ----> right angle cos theta < 0 when theta > 90 degrees ----> obtuse angle cos theta > 0 when theta < 90 degrees ----> acute angle
Alright I am still stuck
do you have a unit circle? do you understand how the cosine function works?
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yes and yes
@dumbcow
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