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Sine and Cosine Standard Angels

Sine and Cosine Standard Angels - Sine and Cosine for...

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Sine and Cosine for Standard Angles An easy way to remember the values of sine and cosine at the 5 standard angles in the first quadrant: rounded to θ sin( θ ) nearest 0 . 1 0 0 / 4 0 π/ 6 1 / 4 .5 π/ 4 2 / 4 .7 π/ 3 3 / 4 .9 π/ 2 4 / 4 1 rounded to θ cos( θ ) nearest 0 . 1 0 4 / 4 1 π/ 6 3 / 4 .9 π/ 4 2 / 4 .7 π/ 3 1 / 4 .5 π/ 2 0 / 4 0 On the next two pages are graphs of sin( θ ) and cos( θ ) for standard angles θ in [0 , 2 π ]. Rounded values of these functions are given on page 2. For the purpose of sketching graphs of polar equations, we generally do not require more precision than is given by real numbers

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