Question

Answer to this double-angle formulae equation in trigonometry?

`(Cos (pi/12) + Sin( pi/12))^2`

Answer 1

`(Cos (pi/12) + Sin( pi/12))^2`

`=Cos^2 (pi/12) + Sin^2 (pi/12)+2sin(pi/12)cos(pi/12)`

`=1+sin(2xxpi/12)`

`=1+sin(pi/6)`

`=1+1/2=3/2`