Trigonometry Reduction Formulae

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Before I came across this video I was stressed and paniking about tomorrow math exam 😅😅....but now I know that I am gonna ace it tomorrow 😎😎😎😎😎
Thank u sir

debrah_dante
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I used this for 2 years and in all honesty it has really helped but to ANYONE WATCHING DO NOT USE THIS, it confuses the shit out of you when doing negative angles, rather do the old school way if you want to learn. Im writing this 2 days before my math P2 final because this messed me over with negative angles.

naeemabed
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You did not explain the mixed grill correctly

ltmaximillianmus
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This video looks like it was made in the year 2000

Matt-zmxl