`lim_(h->0)(sin(pi/3+4h)-4sin(pi/3+3h)+6sin(pi/3+2h)-4sin(pi/3+h)+sinpi/3)/(h^4)`

lim_(h rarr0)(sin((pi)/(3)+4h)-4sin((pi)/(3)+3h)+6sin((pi)/(3)+2h)-4sin((pi) /(3)+h)+(sin pi)/(3)/(h^(4))

4sin(pi/3+theta)sin(pi/3-theta)=

lim_(h -> 0) (sin(a+3h)-3sin(a+2h)+3sin(a+h)-sina)/h^3 =

sin(pi)/(4)*sin(3 pi)/(4)*sin(5 pi)/(4)*sin(7 pi)/(4)=

Evaluate cos (2pi/3)cos (pi/4)-sin(2pi/3)sin(pi/4)

sin""(3pi)/(5)+ sin""(4pi)/5+sin""(6pi)/(5)+sin""(7pi)/(5)=

(sin(a+3h)-3sin(a+2h)+3sin(a+h)-sin a)/(h^(3))=

Evaluate sin^2(pi/4)+sin^2 (3pi/4)+sin^2(5pi/4)+sin^2(7pi/4)

Prove that: 3sin(pi/6)sec(pi/3)-4sin((5pi)/6)cot(pi/4)=1

Prove that: 3sin(pi/6)sec(pi/3)-4sin((5pi)/6)cot(pi/4)=1