Why is sin(20) = sin(160) = -sin(200) = -sin(340)?

7 Answers

  • Duck
    Lv 7
    3 weeks ago

    Because it 's a repeating function.

  • Jim V
    Lv 7
    3 weeks ago

    Notice that each of the numbers is 20° off of the X axis.

    That is why.

    160° and 200° are 20° off of 180°

    340° is 20° off of 360° (or 0°) and is the same thing as -20°.

    And 200° and 340° are on the negative side.

    Thus the sine distance from the X axis is the same in all cases.

    (The last two being on the negative side.)

  • 3 weeks ago

    sin is not about numbers...TIRH

  • poldi2
    Lv 7
    3 weeks ago

    I am curious what this has to do with Religion.

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  • Atheists will tell you SIN doesn’t exist

  • 3 weeks ago

    I don't know. That's very weird. I never claimed to have a head for math. I only claimed that I don't believe gods exist. 

  • Because sine waves are periodic, symmetrical and are odd functions

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