Question

cos 60 ×cos30 +sin60×sin30​

Answer 1

cos a cos b+ sin a sinb = ( cos a-b)

hence ,,cos60 cos 30 + sin 60 sin 30

= cos 60-30

cos 30= √3/2

Answer 2

1/2×^3/ 2+^3/2×1/2

^3/2

ans =root 3 divide by 2

hope it will be helpful