Question

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 ?

Answer 1

A+B+C=180
A+C=2B
B=.... ?

Answer 2

B=60

Answer 3

how about hit and trial..
assume the angles are 60,60,60
so final ans becomes sqrt3 ! :P

please confirm..

Answer 4

Yes..)

Answer 5

but i did nt get u..)

Answer 6

from sine rule, c/a =... ?
then c/a *(2sin A cos A )= .. ?

Answer 7

Ha...Silly...i got it..:)

Answer 8

wasn't it easy ? ;)

Answer 9

what means AP ?

Answer 10

Arithmetic Progression
if, a,b,c are in AP, then
2b=a+c

Answer 11

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

Answer 12

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

Answer 13

OPSS... i look ur coment before hartnn :)