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dedderick

  • 2 years ago

In the triangle, x = 3. Find y.

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  1. dedderick
    • 2 years ago
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  2. mathsmind
    • 2 years ago
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    have you studied Pythagoras theorem

  3. mathsmind
    • 2 years ago
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    ?

  4. dedderick
    • 2 years ago
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    no not yet

  5. mathsmind
    • 2 years ago
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    ok you want to solve this using sin and cos

  6. mathsmind
    • 2 years ago
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    you should have done it right?

  7. itsmeeQUENNIE
    • 2 years ago
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    @dedderick the formula for pythagoran theorem is |dw:1360070556954:dw|

  8. mathsmind
    • 2 years ago
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    you can use the sin rule or the cos rule

  9. dedderick
    • 2 years ago
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    ok

  10. dedderick
    • 2 years ago
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    how which side to square

  11. dedderick
    • 2 years ago
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    i meant what side do we square

  12. mathsmind
    • 2 years ago
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    i will give you the answer and then prove it for you

  13. dedderick
    • 2 years ago
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    then i can understand it better

  14. mathsmind
    • 2 years ago
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    if x =3 in your case then y=\[3\sqrt{2}\]

  15. mathsmind
    • 2 years ago
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    now you should know that \[\sin 45 = \cos 45=\frac{ 1 }{ \sqrt{2} }\]

  16. dedderick
    • 2 years ago
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    right

  17. Nataliecowell
    • 2 years ago
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    In any right triangle, you can use the Pythagorean Therom to solve for sides. In that triangle, x is 2 of the sides and equals 3. Pyhtagreons Therom is a^2+b^2=c^2 A and b are the x's in the diagram. So 3^2 + 3^2 is equal to 18= c^2 Then find the square root of 18 to solve.

  18. mathsmind
    • 2 years ago
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    do you agree with that rule

  19. dedderick
    • 2 years ago
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    yes i understand now

  20. mathsmind
    • 2 years ago
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    the guy says he hasn't done Pythagoras theorem

  21. mathsmind
    • 2 years ago
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    so we had to go to a different ulternative

  22. dedderick
    • 2 years ago
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    ok

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