Question

sinx×sin30+cosx×cos30=1/2

Answer 1

x=90
as we do verification by substituting 90 degrees in place of x we get RHS i.e, 1/2

Answer 2

= sin 90 * sin 30 + cos 90 * cos 30

= 1 * 1/2 + 0 * root 3/2

= 1 * 1/2 + 0

= 1/2.


So, the value of x should be 90.