Question

If sinA + sinB=1 and sinA-sinB=1, find A.

Answer 1

sinA + sinB=1 and sinA-sinB=1
Then, adding both the equation gives:
2sinA =2
sinA=1

Answer 2

Now,

Answer 3

got it?

Answer 4

i thought it will be like sum and difference. you squared the first term - the squared of the 2nd term

Answer 5

No..... I just added both the equations

Answer 6

it just depend in the equation :)) okay thanks.. i got it :) can i know your secret? haha

Answer 7

Welcome

Answer 8

And a-b = a+ b = 1 has to be b = 0

Answer 9

but why?

Answer 10

sauravshakya just showed you why, but it should be clear from just looking at it.

Answer 11

anyway. thanks to your help :) i'll just ask a question again later :)

Answer 12

ur welcome