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March 1, 2015

March 1, 2015

Posted by **Edwards** on Wednesday, August 3, 2011 at 9:38am.

Without using a calculator, show that Theta = 18 degrees is an exact solution of the equation Sin3 Theta = Cos2 Theta.

Justifying your answer, find the exact values of:

i) Sin18 degrees.

ii) Sin234 degrees.

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