Trigonometric ratios for common angles
10:10
Khan AcademyAshish Gupta
Trigonometric ratios for common angles
In this video, we look at the trigonometric rations (sin, cos, and tan) for some common angles. We first define the trigonometric ratios as the coordinates of points on the unit circle. First we look at the multiples of pi/2. We then use geometry (right angled triangles and equilateral triangles) to find the coordinates for some other common ...
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Trigonometry Compound Angle Formulas
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How Do We Use the Compound Angle Formulas? Part 3 In SQA Higher maths you need to be confident with how to use the compound angle formulas. These are given to you in your formula sheet so you don’t have to memorise them, you just need to know how to use them! Let’s tackle it together 🚀 In this video, we finish looking at a past paper question where we need to use our SOHCAHTOA and Pythagoras Theorem to complete part a then use those answers alongside our compound angle formulas for part b. For
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How Do We Use the Compound Angle Formulas? Part 3 In SQA Higher maths you need to be confident with how to use the compound angle formulas. These are given to you in your formula sheet so you don’t have to memorise them, you just need to know how to use them! Let’s tackle it together 🚀 In this video, we finish looking at a past paper question where we need to use our SOHCAHTOA and Pythagoras Theorem to complete part a then use those answers alongside our compound angle formulas for part b. For
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