Prelim 3U Math Trig Question - Help (1 Viewer)

may22

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My entire class and teacher tried this proving question about 6 times, on both LHS and RHS, but we were stumped. Any ideas?

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may22

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@Life'sHard @Drongoski Thanks guys! :)

I'm just not sure what you did in the second last step? How did you go from 1-tan(theta) in the denominator to 1 - tan pi/4 tan(theta)?
 
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