Question
Use half angle identities to find exact value.
Given tan theta = -sqrt 2 / 2 and theta lies in quadrant IV, find cos theta / 2.
Given tan theta = -sqrt 2 / 2 and theta lies in quadrant IV, find cos theta / 2.
Answers
Steve
so, go find the appropriate half-angle rule. What do you get?
Just to get you started, for that θ in QIV,
sinθ = -1/√2
cosθ = 1/√2
Just to get you started, for that θ in QIV,
sinθ = -1/√2
cosθ = 1/√2