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Math Help - Trig!!!

  1. #1
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    Trig!!!

    Hello!!! i really need help with TRIG!! hi dont understand the relationship betwek trig functions and finding the equivalent trig fucntion

    for example..

    Prove algebraically

    tan = cot(pi/2 - x)
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  2. #2
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    Quote Originally Posted by Happy1234 View Post
    Hello!!! i really need help with TRIG!! hi dont understand the relationship betwek trig functions and finding the equivalent trig fucntion

    for example..

    Prove algebraically

    tan x = cot(pi/2 - x) Red edit by Mr F.
    \cot \left( \frac{\pi}{2} - x \right) = \frac{\cos \left( \frac{\pi}{2} - x \right)}{\sin \left( \frac{\pi}{2} - x \right)} = \frac{\sin x}{\cos x} = \tan x.

    Things you are totally expected to know (for this particular question, anyway. Undoubtedly there are other basic things you are expected to know):

    1. \cot \theta = \frac{\cos \theta}{\sin \theta}.

    2. Supplementary angle formulae: \cos \left( \frac{\pi}{2} - x \right) = \sin x \, and \sin \left( \frac{\pi}{2} - x \right) = \cos x .

    Perhaps the reason you're struggling with these types of questions is that your knowledge bank is low on funds - time to start making deposits .....
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