Trigonometry [ R Formula ]

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EDEXCEL F. Pure Mathematics and IAL Pure Mathematics syllabus include this topic.

This video explains the conversion of trigonometric equations like
asinx ± bcosx and acosx ± bsinx into harmonic forms[ Rsin(x±α), Rcos(x±α) ]. This topic is included in the syllabus of IGCSE Further Pure Mathematics and IAL Mathematics.

0:00 Formulas
1:10 Example 1
7:35 Example 2
10:58 Derivation of formula

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Self studying P3. Good video. Really helped.

md.abraralzabir
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The kind of maths teacher I never had.. keep up the good work ma’am!

sakibahmedchowdhury
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Thank you so much for the video miss it helped me a lot as I was stuck in trigonometry only for these two formulas; the book doesn't even explain them properly!! Can you please give tips on memorizing all the identities, I keep forgetting them!

followhrcdraculadnan