Exercises 61 and 62: Find the following. (a) sin(a + B) (b) cos(a + B) (c) tan(a + B) (d) The quadrant containing a + B 61. cos a = and cos and cos = 3, where a and 3 are both in quadrant I. 62. sina = -and tanß = -1, where a and 3 are both in quadrant IV.

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