Stitz-Zeager_College_Algebra_e-book

Verify the cofunction identities for tangent secant

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Unformatted text preview: is cos(θ)? 25 4 with θ in Quadrant I, what is sin(θ)? 9 5 with θ in Quadrant II, what is cos(θ)? sin(θ) = 13 2 cos(θ) = − with θ in Quadrant III, what is sin(θ)? 11 2 sin(θ) = − with θ in Quadrant III, what is cos(θ)? 3 28 cos(θ) = with θ in Quadrant IV, what is sin(θ)? 53 (b) If cos(θ) = (c) If (d) If (e) If (f) If 3. Find all of the angles which satisfy the given equations. √ 1 (a) sin(θ) = 2√ (c) sin(θ) = 0 √ (e) sin(θ) = (b) cos(θ) = − (d) cos(θ) = (f) cos(θ) = −1 3 2 2 2 3 2 4. Solve each equation for t. (See the comments following Theorem 10.5.) (a) cos(t) = 0 (b) sin(t) = − (c) cos(t) = 3 √ 2 2 (d) sin(t) = − 1 2 1 2 (f) sin(t) = −2 (e) cos(t) = (g) cos(t) = 1 (h) sin(t) = 1 (i) cos(t) = − √ 2 2 632 Foundations of Trigonometry 5. Use your calculator to approximate the following to three decimal places. Make sure your calculator is in the proper angle measurement mode! (a) sin(78.95◦ ) (b) cos(−2.01) (c) sin(392.994) (d) cos(207◦ )...
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This note was uploaded on 05/03/2013 for the course MATH Algebra taught by Professor Wong during the Fall '13 term at Chicago Academy High School.

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