Question

If A and B are two acute angles satisfying the equation 3sin^2A + 2sin^2B=1 and 3sin2A-2sin2B=0 then A+2B

Answer 1

Welcome to OpenStudy Pajji

Answer 2

Sir Please Show your working.

Answer 3

I'll attach a file wait for once
I have converted
sorry I can't attch the file but I will till you the steps till where I reached
3sin^2A=1- 2sin^2B (1-2sin^2B=cos2b
3sin2A=2sin2b
cancelling sin on both sides(I think this method is wrong) then getting 3A=2B
then equating it in the above equation

Answer 4

Now what to do???????????? big question

Answer 5

Sir pls help

Answer 6

three anwers are given in the textbook for this question
14 ,15 and 17

Answer 7

it's ok. Now solve and Show this question too in the same way :-

3sin2A-2sin2B=0

Answer 8

can I cancel sin on both sides?

Answer 9

or should I use double angle property

Answer 10

not cancel only you can remove sine both sides

Answer 11

@ParthKohli HELP BRO I got stuck in this question

Answer 12

@patrickthestar

Answer 13

pls help @ParthKohli sir

Answer 14

with?

Answer 15

I am not able to solve this problem I am trying it for last 1 hr pls any1 help because day after tomorrow is my exam

Answer 16

@patrickthestar have u to any step pls hare I will try to solve it from there

Answer 17

hare=share

Answer 18

Hey, I think I found the value for 2a+2b..but that doesn't solve your purpose..does it?

Answer 19

pls share it

Answer 20

It's around 110 degree..what is the answer?

Answer 21

@kanwal32 not many people are on who can answer these type of questions. I'm sorry but you may have to wait till tomorrow to have this question answered.

@Hero
@Luigi0210
Help if you can guys :)

Answer 22

90 is degree

Answer 23

Let me check that again!

Answer 24

I am getting
2a+2b=107.45 degree!

Answer 25

@dan815 will be better help :)

Answer 26

@dan815
@dan815
@dan815
We call upon thy booty
@dan815
@dan815
@dan815
@dan815

Answer 27

@dan815 pls help

Answer 28

hey okay

Answer 29

pls save my life @dan815

Answer 30

thnx

Answer 31

sorry i believe i mis read your question the square is only for the first equations right

Answer 32

yes

Answer 33

can we conver 1-2sin^2(b) =cos2b

Answer 34

3sin^2A + 2sin^2B=1 <--- use this identitiy sin^2(A)=1/2(1-cos(2a))
3sin2A-2sin2B=0

Answer 35

Yes and then derive the first line and then you will have it in terms of sin

Answer 36

Then you can use a linear combination to eliminate

Answer 37

3/2-3/2cos(2a)+1-cos2b=1
deriving this gives
3sin2a+2sin2b=0
other eqn
3sin2A-2sin2B=0
How we can add them together and eliminate 2sin2b
and solve for A, remember A<pi/2 rad or <90 deg

Answer 38

Any questions?

Answer 39

no thnx