Trig Tricks: How to get cos(π/3, π/4, π/6) and sin(π/3, π/4, π/6) without a calculator
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In this video I demonstrate how to get cos(π/3, π/4, π/6) and sin(π/3, π/4, π/6) without a calculator. The task can be done simply by using an equilateral triangle and a square. Watch the video to find out how.
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