The rule sin(A)cos(A) = (1/2)sin(2A), which is what you used to get up to what you were up to.Apply what rule?
The rule sin(A)cos(A) = (1/2)sin(2A), which is what you used to get up to what you were up to.Apply what rule?
I still don't understand, sorry.The rule sin(A)cos(A) = (1/2)sin(2A), which is what you used to get up to what you were up to.
The rule is sin(A)cos(A) = (1/2)*sin(2A).Btw is the rule sin(x) = 1/2*sin(x)cos(x)?
I don't seem to completely understand that rule
These two can't be simultaneously correct identities. The first one is the one that is correct. Rearrange that to obtain: sin(2x) = 2*sin(x)cos(x).Just to clarify 1/2*(sin2x)=sin(x)cos(x)
and sin2x=sin(x)cos(x)/2?
Have you investigated on why you don't get those questions?I kept note of all the questions I had troubled with throughout the day with maths and post it here (on the prelim maths help forum) for help. Trig is one of my worst topic so I am doing alot of questions to get better at it and whilst doing these questions I come across some questions which I don't get for which I seek help for.
Maybe my mathematical ability is not too good :/Have you investigated on why you don't get those questions?
Rathin, I'm sure I'm not the first to mention this but you REALLY need to use brackets.Fk it I'll still ask for help
Prove:
sin(2θ)+1/cos(2θ)=cos(θ)+sin(θ)/cos(θ)-sin(θ)
I did not think of doing sin^2(θ)-cos^2(θ)Rathin, I'm sure I'm not the first to mention this but you REALLY need to use brackets.
That expression is too ambiguous for me to decipher instantaneously.
That being said...
And the result follows through from cancellation.
Trig is basically algebra, you need practice. Just revise and practice constantlyI did not think of doing sin^2(θ)-cos^2(θ)
Thank you so much
Would this be better (sin(2θ)+1)/(cos(2θ))=(cos(θ)+sin(θ))/(cos(θ)-sin(θ))?
Legit question, How do i get better at further trig? I dont know why I am so bad...:/