Question

needed very urgentlyyyyyyy

Answer 1

@msingh as always in triangles, the side is opposite the angle - side a is opposite angle A, etc.

Answer 2

k

Answer 3

@msingh still need help with this ?

Answer 4

is the answer sqrt 3 ?
this can be done using sine rule.
and ofcourse, knowing the fact that A,B,C are in AP

Answer 5

oh, and this too.
sin 2x = 2sin x cos x

Answer 6

First of all for solving this question do you know the conception of : Arithmetic Progression of trigonometric equations.

And after doing that, I personally guarantee that you can on your own solve this particular question.
I personally believe, the happiness of solving Mathematics is much better.

Answer 7

dude, you tried ?

Answer 8

@goformit100 why are you posting this on every question?

Answer 9

can any one solve it plse
just want to clear my doubt
plseee

Answer 10

i will give you a start, you can try further.
A,B,C in A.P ----> A+C = 2B
in a triangle, A+B+C = pi
find the value of angle B from here.

Answer 11

yes , i will
2B+B= 180
B = 60

Answer 12

yes.
so, A+C =.... ?

Answer 13

also, you know sine rule ? what is it ?

Answer 14

A+C= 2*60=120

Answer 15

first find a/c from sine rule. (and c/a)
which are ... ?

Answer 16

you know sine rule, right ?
or should i write it ?

Answer 17

a/sinA=b/sinB=c/sinC

Answer 18

yes, so,
a/c =... ?

Answer 19

srry , i don't know

Answer 20

a/sinA=c/sinC
a/c = sin A/ sin C

Answer 21

okay

Answer 22

in your question, we need
a/c sin 2C , right ?
with sin 2C = 2 sin C cos C
what will
a/c sin 2C simplify to ??

Answer 23

a/c (2sinCcosC)

Answer 24

we had a/c = sin A/ sin C also.
why didn't you put it ?

Answer 25

@agent0smith Sir I am just inspiring the users to solve questions on there own, simply enlightening their inner power of solving mathematics.

Answer 26

(sinA/ sinC )*sin2C
=2sin^2A

Answer 27

:O
sin A / sin C * 2sin C cos C
sin C gets cancelled
2 sin A cos C
wake up ?

Answer 28

what about c/a sin 2A ?

Answer 29

oops i m srry for that
(sinC/ sinA )*sin2A
2sin C cos A

Answer 30

yes,
so you have
2 sin A cos C + 2sin C cos A = 2 (sin A cos C + sin C cos A ) =.... ?
can you think of a standard formula ?

Answer 31

just last 2 steps remaining...

Answer 32

2 sin(A + C)

Answer 33

yes,!
and you know the value of A+C
so,
2 sin (A+C) = 2 sin 120 =.. ?

Answer 34

underroot 3

Answer 35

thats what i also got :)

Answer 36

@hartnn
thank u so much bro.
really thanks

Answer 37

@msingh
welcome so much bro.
really welcome ^_^