Further Trigonometry and Calculus (1 Viewer)

[Kutay]

Hey i have a question, which i came across in going through chapter 6 of Jim Coroneos text book. In the chapter 6 (Further Trigonometry and Calculus) i came across a area which exclaimed Trigonometric sums and differences to products and vice versa

it include all things like e.g. 2sinA cosB = sin (a + B) + sin (a - b)

I have never seen a question like in relation to this specific format and wondering has anyone else, or is it an unlikely thing that gets asked ?

Thank you in advance Kutay

 

[Dreamerish*~]

I think that's no longer in the course.

Wait for someone else to confirm it.

 

[klaw]

it's no longer in the course, but it can make some Qs a lot easier to do

 

[香港!]

u use dem in some 4Unit questions, especially those in integration
e.g integrate: sin3x cos 7x dx
u can use that there

 

[Antwan23q]

yeh, its only in the 4 unit course

 

[Kutay]

Good heh, was stressing cause i am doing revision and then i came across something i have never seen before thats a load of my chest