OpenStax, Algebra and Trigonometry 2e §9.5 Solving Trigonometric Equations · Exercise 180 · Trigonometry · Identities

Solving Trigonometric Equations · Exercise 180

Find all solutions exactly on the interval $0 \leq θ \leq π$

Find $s in (\frac{θ}{2}), cos (\frac{θ}{2}),$ and $t an (\frac{θ}{2})$ given $cos θ = \frac{7}{25}$ and $θ$ is in quadrant IV.

~8 minWritten answer · compare with the solution

OpenStax, Algebra and Trigonometry 2e · §9.5 Solving Trigonometric Equations · Exercise 180

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