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i cant calculate sin(20*pi*0) 0-80 i need some assistants

Solved by A. F. in 20 mins

Hello I am trying to convert a written formula into Excel but not having much joy! Please see below, is there anything obvious that I am missing?
=(F$2/sq(F$3^2+10^4*pi^2*F$4^2))*sin(100*pi*A2-tan^-1(100*pi*F$4/F$3))
Your help would be greatly received :)

Solved by O. S. in 28 mins

x= a*cos(Kx *t)
y=b*sin (Ky *t) parametic equation

Solved by E. H. in 18 mins

how do i use pi functions in developer tab?

Solved by A. S. in 12 mins

=SQRT(((2*SIN(D4))/(SQRT(3))+0.5)^2+0.75)
This is the formula that i want to put in but doesn't let me, is there something wrong? (D4=1,16875)

Solved by A. A. in 17 mins