A-Level Maths: E5-03 [Trigonometric Identities: Simplifying Expressions]

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Комментарии
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These videos have been very helpful, thank you

joedowd
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Would you do any videos going through full papers ?

tacituskilgore
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Keep the content coming you are amazing

DN....
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Hi Jack, hope you are doing great. This video came up while searching for trig product to sum identities.

I understand you dont actively teach the Pearson specification, but I would presume this trig sum/product identities are taught in any of the spec.

While doing question from the Year 2 Pearson book, I found a cheeky question... Would appreciate if you looked at it... Page 355 review exercise, Question 29... I always knew and kind of regretted the sum to product trig identities were not in A Level spec. When finding the area between A and B, top halve, I had to resort to sum/product identities to integrate. I thought surely this cant be the case so I checked the solution bank, and sure enough they were using it there.

Interestingly no marks are specified like other (E/P) questions and no where in the spec did they teach these... am I missing something here?

Have a great weekend!

PS. sum to product is in the formula book, but not product to sum!

AceOfHearts
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what kind of questions are asked in the exam with relations to this topic ( I'm still in year 1 btw)

christyjane
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What is 3 sin^2 theta + 4 cos^2 theta interns of sin theta

OtterFan
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How does no.2 suddenly become SinTHETA x SinTHETA^2/Cos^2?!

jdgoldvox
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No.2 could also be sin^3(x)sec^2(x). In no 4 you can say sin^2x - cos^2x = - cos2x using the identity cos^2x - sin^x - cos 2x. For no 5 again using the same identity, you could have also said (sin^x - cos^x)/1-sin^2x = -cos2x/cos^2x (which is probably the same as tan^2x - 1)

kakashi