Warm-up: Find sin(195o) HW : pg. 501(1 – 18).

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Presentation transcript:

Warm-up: Find sin(195o) HW : pg. 501(1 – 18)

HW Answers: pg. 490(1 – 4, 7 – 16, 21- 24, 45 – 48)

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Find sin(x + y), cos(x + y) and tan(x + y) given sinx = 12/13, cosx < 0 siny = -4/5 , 3π/2 < y < 2π 3 13 12 -4 5 -5 Sin(x + y) = sinxcosy + cosxsiny cos(x + y) = cosxcosy – sinxsiny

Find sin2x and cos2y given sinx = -15/17, π < x < 3π/2 siny = 4/5 , cosy < 0 -8 5 4 -15 17 -3

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