Mathematics

10th

grade

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тригонометрия

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  • 1. Multiple Choice
    30 seconds
    1 pt

    основное тригонометрическое тождество

    sin2x +cos2x=1\sin^2x\ +\cos^2x=1

    1+tg2x=1cos2x1+tg^2x=\frac{1}{\cos^2x}

    sin2x+cos2y=1\sin^2x+\cos^2y=1

    tgx×ctgx=1tgx\times\operatorname{ctg}x=1

  • 2. Multiple Choice
    30 seconds
    1 pt

     sin π3=\sin\ \frac{\pi}{3}=  

     12\frac{1}{2}  

     32\frac{\sqrt{3}}{2}  

     22\frac{\sqrt{2}}{2}  

    0

  • 3. Multiple Choice
    30 seconds
    1 pt

     cos π4=\cos\ \frac{\pi}{4}=  

     12\frac{1}{2}  

     32\frac{\sqrt{3}}{2}  

     22\frac{\sqrt{2}}{2}  

    0

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