Write tanΘ in terms of sinΘ if the terminal side of Θ is in quadrant IV. So far I have cos^2Θ+sin^2Θ=1 cosΘ=+/-sqrt(1-sin^2Θ) but this is as far as I can get?
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Cosine is positive in this quadrant, so you should be able to write . You can test this with an angel in IV.
Thanks! I've got it now.
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