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OpenStudy (anonymous):
If I reduce the evaluation of a trigonomic function, what is the evaluation of the same fucntion at it's reference angle? sin 245* and cos 245*
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hero (hero):
What's preventing you from figuring this out on your own?
OpenStudy (anonymous):
I have no idea how to figure it out
hero (hero):
Find the reference angle, then take the sine and cosine of it.
OpenStudy (anonymous):
Sin245 is on the third quadrant on the circle therefore, 245-180=65 degree use your calculaTor to see what is sin65 then sin245 is negatve number because in the third yquad
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