Question

The value of 2sin(75 degree).sin(15 degree)is …..​

Answer 1

Answer:

please mark as brainliest and follow me

Answer 2

Using 2sin A sin B=cos(A−B)−cos(A+B),

we get: 2sin 75⁰ sin 15⁰

=cos(75⁰−15⁰)−cos(75⁰+15⁰)

=(cos 60⁰+cos 30⁰)

=(cos 60⁰−cos 90⁰)

=( ½ −0)

= ½