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Yahoo!

  • 3 years ago

if the angles A ,B ,C of a triangle are in AP and if a,b,c denotes the lenght of the side opposite to A, B , C respectively then the value of the expression a/c *sin2C + C/a * Sin2A is ?

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  1. hartnn
    • 3 years ago
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    A+B+C=180 A+C=2B B=.... ?

  2. Yahoo!
    • 3 years ago
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    B=60

  3. shubhamsrg
    • 3 years ago
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    how about hit and trial.. assume the angles are 60,60,60 so final ans becomes sqrt3 ! :P please confirm..

  4. Yahoo!
    • 3 years ago
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    Yes..)

  5. Yahoo!
    • 3 years ago
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    but i did nt get u..)

  6. hartnn
    • 3 years ago
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    from sine rule, c/a =... ? then c/a *(2sin A cos A )= .. ?

  7. Yahoo!
    • 3 years ago
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    Ha...Silly...i got it..:)

  8. hartnn
    • 3 years ago
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    wasn't it easy ? ;)

  9. RadEn
    • 3 years ago
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    what means AP ?

  10. hartnn
    • 3 years ago
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    Arithmetic Progression if, a,b,c are in AP, then 2b=a+c

  11. RadEn
    • 3 years ago
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    actually, if a,b,c in AP then the triangle have sides 3x, 4x, 5x. it means the right triangle. right ?

  12. hartnn
    • 3 years ago
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    how did u come up with sides 3x, 4x, 5x ? and angels are in AP, not sides....

  13. RadEn
    • 3 years ago
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    OPSS... i look ur coment before hartnn :)

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