Question 857167: Without using a calculator determine if each function is poositive or negative
a) sin 145 degrees
b) cos 160 degrees
c) cos 210 degrees
d) sin 255 degrees
e) cos 355 degrees
Can you please help me out? Thanks so much in advance:)
Answer by lwsshak3(11628)   (Show Source):
You can put this solution on YOUR website! Without using a calculator determine if each function is poositive or negative
a) sin 145 degrees (Q2, sin>0)
b) cos 160 degrees (Q2, cos<0)
c) cos 210 degrees (Q3, cos<0)
d) sin 255 degrees (Q3, sin<0)
e) cos 355 degrees (Q4, cos>0)
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