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anonymous
 one year ago
Hi please help :)
How do we prove that ( tan^3 15 deg 3tan^2 15 deg 3tan15deg ) = 1 ?
anonymous
 one year ago
Hi please help :) How do we prove that ( tan^3 15 deg 3tan^2 15 deg 3tan15deg ) = 1 ?

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IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.0write as cubic in x and factor out, hint: look at what x = 1 does.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@IrishBoy123 Got it! thanks for your help :)

bradely
 one year ago
Best ResponseYou've already chosen the best response.0Please find the step by step solution http://www.mathskey.com/question2answer/31765/howdoweprovethat
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