Trigonometry: How to use the ASTC Rule | The Quadrant | CAST

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[@gargar7320]

Great teaching! How about for angles 180/270? Do I just have to remember the values for these angles?

[@AVITECHNOLOGIES]

You can use ideas from the video or get the specific value for 180/270.

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[@princenketiah959]

How do you got the last answers like after the -sin45 and -cos30?

[@vrindaputhan9748]

it is supposed to be 1/ root 2 and 2/ root 3

[@AVITECHNOLOGIES]

I don't understand your question. -sin45° =1/√2 -cos30° =(√3)/2

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[@RIAILUALDENG]

if i may asked how did 45 angle come negative root 2/2 please help me to know that

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[@SharonWilson-j3q]

But sir sin 45 is 1/root 2

[@AVITECHNOLOGIES]

It's a surd, so you have to rationalise.

[@sudipbosu8787]

√2/2 = √2/√2.√2 = 1/√2

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