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Atkinsoha

  • 3 years ago

PreCalc & Trig Help! Picture below. I did one like this already, but for some reason I just can't figure this one out. :/

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  1. Atkinsoha
    • 3 years ago
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  2. Hoa
    • 3 years ago
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    B

  3. Atkinsoha
    • 3 years ago
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    can you tell me how you found that so i know for the rest of the ones like it ?

  4. Hoa
    • 3 years ago
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    let x= o-->sin(o) =0 and 2x=0 ---> sin2x =0 . you can conclude that sinx = sin2x when x =0. other solutions are not right because there are some pairs not satisfy sinx =sin2x.

  5. Atkinsoha
    • 3 years ago
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    Okay, thank you.

  6. Hoa
    • 3 years ago
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    for example: in A)if x =pi/2---> sin(pi,2) = 1 but sin 2(pi/2) = sinpi=0

  7. Hoa
    • 3 years ago
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    ok, I'm glad you understand

  8. Atkinsoha
    • 3 years ago
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    yup thanks!

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