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I'll teach you a trick to insert angles in radians on the trigonometric circle in a VERY SIMPLE way! Try it and believe it! 0:00 - 3/2 π 1:03 - 3/4 π 2:30 - 7/6 π 3:59 - 5/3 π Exercises on expressions with trigonometric functions: https://www.matematika.it/public/eser... Useful links: Memorize sin, cos and tan: • The foolproof method for memorizing... Playlist of trigonometric functions: • Trigonometric Functions