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OpenStudy (anonymous):
Show that the equation tan(45◦ + x) = 4 tan(45◦ − x) can be written in the form 3 tan2x − 10 tan x + 3 = 0.
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OpenStudy (midhun.madhu1987):
|dw:1410205974491:dw| also tan 45 = 1 use these formulae to simplify
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