Question

plzz solve the question (b)

Answer 1

please find the answer in the attachment.
Hope this helps!!

Answer 2

5cos^2 60° + 5 sec^2 30° - tan^2 45°/sin^2 60° +cos^2 60°
= (5/4 + 15/3 + 1) / 3/4 + 1/4
= ((15+60+12)/12)/1
= 87/12