Stitz-Zeager_College_Algebra_e-book

a cos3 cos5 c cos5 cos6 e sin cos b

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Unformatted text preview: 7 24 with θ in Quadrant IV, then cos(θ) = . 25 √ 25 4 65 If cos(θ) = with θ in Quadrant I, then sin(θ) = . 9 9 5 12 If sin(θ) = with θ in Quadrant II, then cos(θ) = − . 13 13 √ 2 117 If cos(θ) = − with θ in Quadrant III, then sin(θ) = − . 11 √ 11 2 5 If sin(θ) = − with θ in Quadrant III, then cos(θ) = − . 3 3 28 45 If cos(θ) = with θ in Quadrant IV, then sin(θ) = − . 53 53 1 π 5π sin(θ) = when θ = + 2kπ or θ = + 2kπ for any integer k . 2 6 6 2. (a) If sin(θ) = − (b) 633 634 Foundations of Trigonometry √ 5π 7π 3 when θ = + 2kπ or θ = + 2kπ for any integer k . 2 6 6 sin(θ) = 0 when θ = kπ for any integer k . √ 2 π 7π cos(θ) = when θ = + 2kπ or θ = + 2kπ for any integer k . 2 4 4 √ 3 π 2π when θ = + 2kπ or θ = + 2kπ for any integer k . sin(θ) = 2 3 3 cos(θ) = −1 when θ = (2k + 1)π for any integer k . π cos(t) = 0 when t = + kπ for any integer k . 2 √ 2 5π 7π sin(t) = − when t = + 2kπ or t = + 2kπ for any integer k . 2 4 4 cos(t) = 3 never happens. 1 7π 11π sin(t) = ...
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