math question help (1 Viewer)

StudyOnly

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Is the answer cosθ ?
If so, just sub tan(θ/2) for t
and you get 1 + (tan(θ/2))^2 at bottom which can be equated using the trig identity to (sec(θ/2))^2
and take it from there
 
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SpiderX1X

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what about that one , just wondering if i got that right
 

klmtutor

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Solutions when cos 2θ = 0 or tan (3θ) - 1 = 0 for 0 ≤ θ ≤ 360.

8 solutions (cos: 45, 135, 225, 315 tan:15, 75, 135, 195, 255, 315)
 
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