Trigonometry Cheat Sheet: Ace your Exam with This Study
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Until now, you probably measured angles in degrees. Most of trig uses radians. Unit Circle The unit circle is segmented into 360 degrees or 2*pi radians. (For this article, p will denote pi=3.14159…) 90 degrees = p/2 radians 180 degrees = p radians 0 degrees = 0 radians = 2p radians = 360 degrees (Note that 0 and 2p are often used interchangeably) The unit circle below gives the commonly used angles and their sines/cosines. If Θ is an angle made by connecting (… Quick Reference
Until now, you probably measured angles in degrees. Most of trig uses radians. Unit Circle The unit circle is segmented into 360 degrees or 2*pi radians. (For this article, p will denote pi=3.14159…) 90 degrees = p/2 radians 180 degrees = p radians 0 degrees = 0 radians = 2p radians = 360 degrees (Note that 0 and 2p are often used interchangeably) The unit circle below gives the commonly used angles and their sines/cosines. If Θ is an angle made by connecting (…
Quick Reference
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