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Question #c15b7

1 Answer

Mar 21, 2017

#3/2, or. 1.5.#

Explanation:

First of all, we see that, the

Expression#= cos^2(pi/12)+2cos(pi/12)sin(pi/12)+sin^2(pi/12)#

Now, knowing that, #cos^2theta+sin^2theta=1, and, #

# 2costhetasintheta=sin(2theta),# we have,

The Exp.#=1+sin(2(pi/12))#

#=1+sin(pi/6)#

#:." The Exp.="1+1/2=3/2=1.5.#

Enjoy Maths.!

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