How to Easily Remember Cosine and Sine Values for Unit Circle Angles
In this video, I show a quick mnemonic trick to remember the cosine and sine values of major angles in the first quadrant of the unit circle. We start with the numbers 4, 3, 2, 1, and 0. We then take the square root of each number and divide it by 2 to obtain the cosine values: 1, √3/2, √2/2, 1/2, and 0. For the sine values, we simply reverse them: 0, 1/2, √2/2, √3/2, and 1. Remember that the angles increase in size from π/6 to π/4 to π/3, with π/6 being the smallest.
#mathematics #math #Trigonometry #UnitCircle #MathTricks
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