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Having fun with an excellent Calculator locate Sine and you can Cosine

Having fun with an excellent Calculator locate Sine and you can Cosine

At \(t=\dfrac<3>\) (60°), the \((x,y)\) coordinates for the point on a circle of radius \(1\) at an angle of \(60°\) are \(\left(\dfrac<1><2>,\dfrac<\sqrt<3>><2>\right)\), so we can find the sine and cosine.

We have now found the cosine and sine values for all of the most commonly encountered angles in the first quadrant of the unit circle. Table \(\PageIndex<1>\) summarizes these values.

To get the cosine and you can sine out of angles other than the unique angles, we look to a pc otherwise calculator. Be aware: Most calculators is set towards “degree” otherwise “radian” function, which informs brand new calculator brand new products into enter in really worth. When we evaluate \( \cos (30)\) on the our calculator, it will check it as the new cosine from 31 stages in the event that brand new calculator is actually education mode, or even the cosine out-of 30 radians if the calculator is within radian mode.