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Answer to this double-angle formulae equation in trigonometry?

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

1 Answer

Feb 16, 2017

#(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#

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