Solving Quadratic Trigonometric Equations

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A Level Maths revision tutorial video.

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Комментарии
Автор

on your cos graph to get more answers you have + or - 560 or 2 radians but they don't equal each other it would be 360 degrees and then in c3 to get more answers you add 360 to the cos graph. which number is it supposed to be

kylecollins
Автор

wait??! when you subtracted 41.8.. with 180 it's -138.2.. and that isnt between 0 and 360 so why did he not add 360 to that number? (-138.2) and why did he make it a positive?

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