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koli123able

  • one year ago

Solve the triangle ABC in which α=48°32' , a=38.87 cm & c=24.93 cm . . . ANSWER= b=50.59, β=102°45' , γ=28°43'

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  1. koli123able
    • one year ago
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    ????

  2. hartnn
    • one year ago
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    sine rule will directly give you γ

  3. koli123able
    • one year ago
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    \[\frac{ a }{ \sin \alpha }=\frac{ c }{ \sin \gamma }\]

  4. koli123able
    • one year ago
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    what will be the formula of sin gamma

  5. hartnn
    • one year ago
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    then cos rule will give you b c^2 = a^2+b^2 -2ab cos γ then sine rule again will give you β. sin gamma is only unknown there.... you'll get sin gamma =.... gamma = sin^-1 (....)

  6. koli123able
    • one year ago
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    what will be the formula of sin gamma??

  7. koli123able
    • one year ago
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    sin gamma = sin alpha x c /a is this the formula???

  8. hartnn
    • one year ago
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    oh, that...yes (c/a) * sin aplha

  9. koli123able
    • one year ago
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    its coming wrong

  10. koli123able
    • one year ago
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    my calculator is giving a math error

  11. hartnn
    • one year ago
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    ....sin gamma is coming > 1 ??

  12. koli123able
    • one year ago
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    it is coming < 1 0_0

  13. hartnn
    • one year ago
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    sin inverse of 0.479

  14. hartnn
    • one year ago
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    28.621 degrees

  15. koli123able
    • one year ago
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    I GOT IT I WAS TYPING WRONG

  16. hartnn
    • one year ago
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    okk..so got b and beta also ?

  17. koli123able
    • one year ago
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    we can also find beta by alpha + beta + gamma = 180 degrees beta = 180 - (alpha +gamma)

  18. hartnn
    • one year ago
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    good!

  19. hartnn
    • one year ago
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    i mean better :)

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