Thank you for your response, would i use substitution instead?
If the question doesnt provide any hints/indication, the usual way is to (identity) transform the trig power to a multiple angle (double, quadruple), then integrate that.
An alternative here could be to use a binomial type identity transformation and use the reverse chain rule on the individual terms.
If the question doesnt provide any hints/indication, the usual way is to (identity) transform the trig power to a multiple angle (double, quadruple), then integrate that.
Ohh okay, im not sure what you mean by multiple angle? I haven’t learnt that before (if it helps i am doing edexcel a level maths)
I found the question online, so it only asks us to integrate (sinx)^3 (there isn’t any other info)
Ohh i don’t think I’ve seen that before, do you know which sub-chapter it is in the edexcel book?
Trig identities? Theyre commonly used for integration problems so there will be examples in the integration section as well. Note your problem is now a cubic but was originally a quartic.
Ohh guys i think i know where i went wrong, when i was searching for how to do it, everyone is using substitution. So they’d split sin^3x into (1-cos^2x)(sinx) and then they’d integrate from there
Ohh guys i think i know where i went wrong, when i was searching for how to do it, everyone is using substitution. So they’d split sin^3x into (1-cos^2x)(sinx) and then they’d integrate from there
Trig identities? Theyre commonly used for integration problems so there will be examples in the integration section as well. Note your problem is now a cubic but was originally a quartic.
Yes sorry, i used misread the question. I meant sin^3x not sin^4x. So would i just use trig identities to integrate it?
No - your teacher should have gone over how to tackle powers of sin [and cos and tan].
Turns out i got confused! Mqb2766 has helped me realise that I need to go over trig stuff because my teacher did go over it but i still didn’t get it so now im going to do some practice on that part, thanks for the help though!