Question

2 tan 45° plus 7 sin 30° plus 5 cos 60°

Answer 1

2×1+7×1/2+5×1/2=2+7/2+5/2
=16/2=8

Answer 2

= 2*tan 45  + 7 * sin 30 + 5 * cos 60
= 2*1 + 7*1/2 +5 *1/2
= 2 + 7 / 2 + 5 / 2
= (4+7+5)  /  2
= 16 / 2 
= 8