Question

If sin a minus b is equals to 3 by 5 and sin a + b is equals to 4 by 5 find sin 2a

Answer 1

Answer:

7/5

Step-by-step explanation:

it is difficult t o write here but take common

afterwards add sin2a annd sin2b

Answer 2

Answer:

sin2AcosA=1

Step-by-step explanation:

a+b=sin^-1(4/5)

a-b=sin^-1(3/5)

adding

2a=sin^-1(4/5)+sin^-1(3/5)

simplify

sin2a=1.