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

8-122.
  1. Angles u and v are in the same quadrant. If cos(u) = and sin(v) = –, evaluate: Homework Help ✎

    1. tan(u + v)

    2. cos(vu)

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

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