Without using a calculator, show that: 3Sin ^2(30) = cos^2(30)

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Without using a calculator, show that: 3Sin^2(30) = cos^2(30)

Guest Jan 21, 2016

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Best Answer

First look at the following diagram:

eq triangle

From this we see that $\sin{30°}=\frac{1}{2}\\\\ \cos{30°}=\frac{\sqrt{3}}{2}$

Can you take it from here?

Alan Jan 21, 2016

Alan · Answer 1 · 2016-01-21T09:35:06

First look at the following diagram:

eq triangle

From this we see that $\sin{30°}=\frac{1}{2}\\\\ \cos{30°}=\frac{\sqrt{3}}{2}$

Can you take it from here?