Question

if <A=60 then sin A=​

Answer 1

Answer:

L.H.S=sin2A=sin2×60

∘

=sin120

∘

=sin(180

∘

−60

∘

)=sin60

∘

=

2

3

..(1)

R.H.S=2sinAcosA=2sin60

∘

cos60

∘

=2×

2

3

×

2

1

=

2

3

..(2)

From (1) and (2) we have

L.H.S=R.H.S