Question

please answer this question ​

Answer 1

Answer:

write question these are trignometer

Answer 2

Answer:

Step-by-step explanation:

apply componendo and divendo we get

2xsinb/2ysina

xsinb/ysina

cosasinb/cosbsina

we should apply again componendo and dividendo beacuse we applied only on one

sin(a+b)/sin(b-a)

-sin(a+b)/sin(a-b)