AS Mathematics for CIE - P1 Trigonometry - Quadratic Trig Equations

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This series follows the AS Mathematics for CIE Workbook written specifically for the CIE syllabus. Each chapter corresponds to one area of the syllabus and includes worked examples and exercises with past exam questions. Full solutions for all questions are available. To see sample pages go to
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THANK YOU THANK YOU THANK YOU
I have my exam in a week and your videos have literally saved my life
THANK YOU SO MUCH

exymath
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Thank you so much for these. I'm home schooled in South Africa and these videos that you have uploaded have been a huge blessing for me. So Thank you very much. I'm doing the Understanding Pure Mathematics text book and they have quite a few other identities as well: Sec, Cosec, and Cotangent. Just thought I should maybe let you know ;). Again thank you so much for these videos you cannot believe how helpful they are for me.

petruslabuschagne
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does (2cosx-1)(cosx+2) not multiply out to 2cos^2x + cosx - 2

SteppingLively