Question

Find the exact value of the expression by using appropriate identities.?

Answer 1

`sqrt(3)/2`

Explanation:

Given: `sin 70^@ cos 10^@ - cos 70^@ sin 10^@`

The given equation is a difference equation `sin (70^@ - 10^@)`

`sin (70^@ - 10^@) = sin(60^@) = sqrt(3/2)`