we rearrange to make solving easier; in P3 addition formula sin2A=2sinAcosA, note that costsint = sintcost , so we rearranged it to make it simpler and match the formula, sin2A=2sinAcosA replace A with t, sin2t=2sintcost therefore, -8sintcost factorise gives -4(2sintcost) hence -4(sin2t)
also only when it's sin(2t) you can arrive to tan(2t), since cos(2t) , it can only be further simplified when sin(2t)/cos(2t) example: sin(t)/cos(2t) can't be tan(2t) or tan(t) both should have the same angle or whatever is in the brackets() should be the same for them to be simplified to silly cow
my mind was actually blown
This is good to hear :)
Good job 👌👍🏾 keep it going 3k subscribers! I have been your subscriber since you had 46 subscribers.
Legend!
man you a savior
May God bless you 🙏
could you do another video on P4 integration?
P4 Integration video will come in the next two weeks, it is a big chapter. :)
how did you do sin 2 theetha on the calculator? as in the double angled sin 2 theetha on 15;43ed min of the video
you basically do sin (2 x theeta) ; you multiply the theeta by 2
13:25 why is it -4(2sintcost)
we rearrange to make solving easier; in P3 addition formula sin2A=2sinAcosA, note that costsint = sintcost , so we rearranged it to make it simpler and match the formula, sin2A=2sinAcosA replace A with t, sin2t=2sintcost therefore,
-8sintcost factorise gives -4(2sintcost)
hence -4(sin2t)
also only when it's sin(2t) you can arrive to tan(2t), since cos(2t) , it can only be further simplified when sin(2t)/cos(2t) example: sin(t)/cos(2t) can't be tan(2t) or tan(t) both should have the same angle or whatever is in the brackets() should be the same for them to be simplified to silly cow
Great explaination - Thank you :)
hello, what is silly cow?
Silly cow is just something used to remember that sin over cos equals tan
@@MindfulMaths thanks!