SOLUTION: determine the sign of the following: sin 190 degrees tan 135 degrees cos(-50 degrees)

Question 910016: determine the sign of the following:
sin 190 degrees

tan 135 degrees

cos(-50 degrees)

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
determine the sign of the following:
sin 190 degrees
190 is in QII where x and y are negative
r is ALWAYS positive
sin = y/r is negative in QII
------------------------------
tan 135 degrees = y/x is Positive/negative is negative
------------------------------
cos(-50 degrees) = x/r is Positive/positive is positive
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Cheers,
Stan H.
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