Question

I don't understand
how I solve this
so you help me
and answer me

Answer 1

hello friend

in this solution he had just put the values of sin60 ,cos30,sin30,cos60
and simplified it
sin60=√3/2
cos30=√3/2
sin30=1/2
cos60=1/2
√3/2+√3/2 will become 2√3/2
1+1/2+1/2 will become 2
and diving 2√3/2 by 2 will give √3/2 which is the value of cos 30