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StudyGurl14

  • one year ago

Help with trignometric equations! MEDAL

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  1. StudyGurl14
    • one year ago
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    |dw:1441828891570:dw| How do I eliminate one of the functions so I can solve for x?

  2. campbell_st
    • one year ago
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    start by making the subsitution sin^2 = 1 - cos^2

  3. Nnesha
    • one year ago
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    sin^2 x+ cos^2 = 1 solve for sin^2 x then replace sin^2x with that

  4. campbell_st
    • one year ago
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    then rewrite the equation with all terms on one side and then you'll be solving a quadratic equation

  5. StudyGurl14
    • one year ago
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    Okay, thanks. I'll try that.

  6. StudyGurl14
    • one year ago
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    I'm stuck @Nnesha @campbell_st |dw:1441829434455:dw|

  7. Nnesha
    • one year ago
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    i guess typo a(b+c)=ab+ac

  8. campbell_st
    • one year ago
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    |dw:1441829240020:dw|

  9. Nnesha
    • one year ago
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    |dw:1441829549441:dw|

  10. StudyGurl14
    • one year ago
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    still stuck |dw:1441829563686:dw|

  11. campbell_st
    • one year ago
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    then is \[2\cos^2(x) + \cos(x) = 0\] factor this

  12. StudyGurl14
    • one year ago
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    Oh, okay. I get the rest. Thanks!

  13. StudyGurl14
    • one year ago
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    |dw:1441829644394:dw|

  14. campbell_st
    • one year ago
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    and don't forget the other solution

  15. campbell_st
    • one year ago
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    |dw:1441829404062:dw|

  16. StudyGurl14
    • one year ago
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    |dw:1441829749290:dw|

  17. StudyGurl14
    • one year ago
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    like that?

  18. campbell_st
    • one year ago
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    that's correct... so you now just need the angles...

  19. StudyGurl14
    • one year ago
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    thanks! I got it from here.

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