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Thread: Trigo- product

  1. #1
    Super Member dhiab's Avatar
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    Trigo- product

    Solve in R this equation :
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  2. #2
    MHF Contributor alexmahone's Avatar
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    $\displaystyle sin x cos x tan x=1$
    $\displaystyle sin x cos x\frac{sin x}{cos x}=1$
    $\displaystyle sin^2x=1$
    $\displaystyle sin x=+1$ or $\displaystyle sin x=-1$
    $\displaystyle x=\frac{\pi}{2}+2n\pi$ or $\displaystyle x=-\frac{\pi}{2}+2n\pi$
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  3. #3
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    e^(i*pi)'s Avatar
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    Quote Originally Posted by alexmahone View Post
    $\displaystyle sin x cos x tan x=1$
    $\displaystyle sin x cos x\frac{sin x}{cos x}=1$
    $\displaystyle sin^2x=1$
    $\displaystyle sin x=+1$ or $\displaystyle sin x=-1$
    $\displaystyle x=\frac{\pi}{2}+2n\pi$ or $\displaystyle x=-\frac{\pi}{2}+2n\pi$
    The above poster is right but bear in mind $\displaystyle n \in \mathbb{Z}$

    (ie: n must be an integer)
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