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 April 29th, 2012, 09:18 AM #1 Member   Joined: Mar 2012 Posts: 32 Thanks: 0 radians sin^2(1/6 pie) does this equal 1/4 how many radians =180 degrees
 April 29th, 2012, 09:26 AM #2 Senior Member     Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,209 Thanks: 517 Math Focus: Calculus/ODEs Re: radians Yes: $\sin^2$$\frac{\pi}{6}$$=$$\frac{1}{2}$$^2=\frac{1} {4}$ There are$\pi$ radians in $180^{\circ}$. We use this equivalence to convert between degrees and radians: $x^{\circ}\cdot\frac{\pi\text{ rad}}{180^{\circ}}=\frac{\pi}{180}x\text{ rad}$ $x\text{ rad}\cdot\frac{180^{\circ}}{\pi\text{ rad}}=\frac{180}{\pi}x^{\circ}$

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