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Home > PC3 > Chapter Ch8 > Lesson 8.3.3 > Problem 8-122


Angles and are in the same quadrant. If and , evaluate:  

If cosine is positive and sine is negative, which quadrant are and in?

Draw a triangle diagram for each angle. One is done for you.

Right triangle, horizontal leg, labeled 8, on top, vertical leg labeled, square root of quantity 17 squared minus 8 squared, = 15, on right, hypotenuse labeled 17, angle opposite vertical leg, labeled, u.