Asked by Anonymous
evaluate the expression under the given conditions
tan 2 theta; cos theta=7/25, theta in quadrant I
tan 2 theta; cos theta=7/25, theta in quadrant I
Answers
Answered by
Steve
If cosθ = 7/25 in QI, then sinθ = 24/25
That means tanθ = 24/7, and you (ahem) know that
tan2θ = 2tanθ/(1-tan^2 θ)
That means tanθ = 24/7, and you (ahem) know that
tan2θ = 2tanθ/(1-tan^2 θ)
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