L4b PreCalcH Trig identities from reflections and rotations

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  1. Ryan Sanders
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Комментарии
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I love this video. It really explained more, and how to do the questions.

adoge
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Thank you so much!!! I was so confused and now I understand :)

amandazamoralira
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This was explained better than the Khan Academy Video itself

Martyr
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Thanks this video was really helpful, I've got a question? on the 6.49 part of the video you mentioned clockwise for negative rotations whereas anticlockwise is for positive rotations. You went against that rule when you went clockwise for a positive rotation. could you clarify that part of the video?

lama
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can you explain how adding or subtracting pi, 2*pi, pi/2 and so on affects the trig identity?

benayasdebela
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Um at 6:43 answer a.) should be in quadrant 4 not quadrant 2. You would need a 2 pi + theta rotation to get back to your original angle theta. As an instructor you should probably be checking your own work....Sal would not approve.

delta