# How to type sin function with square

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John Sanjai J on 20 Nov 2023
Answered: Steven Lord on 21 Nov 2023
I'm working with O.D.E in matlan and I found that I cannot type sin square x. Is there any particular syntax for that or is there any other way?

Sam Chak on 20 Nov 2023
@John Sanjai J, are you expecting this?
syms x
expr = sin(x)^2
expr =
Sam Chak on 21 Nov 2023
The expression sin(x)^2 is equivalent to the mathematical notation , if I have interpreted your syntax 'sin square x' correctly. However, if there is any misunderstanding, please provide the proper mathematical notation using LaTeX to avoid ambiguity.
Walter Roberson on 21 Nov 2023
syms x
char(sin(x)^2)
ans = 'sin(x)^2'
char(sin(x)*sin(x))
ans = 'sin(x)^2'
char(sin(x^2))
ans = 'sin(x^2)'
char(sin(x * x))
ans = 'sin(x^2)'

Steven Lord on 21 Nov 2023
While the usual mathematical notation to compute the square of the sine of x is , the MATLAB code to perform that computation is sin(x)^2 (or, since you likely want to compute the square of the sine element-wise, sin(x).^2).
x = 0:pi/4:2*pi
x = 1×9
0 0.7854 1.5708 2.3562 3.1416 3.9270 4.7124 5.4978 6.2832
sin(x).^2
ans = 1×9
0 0.5000 1.0000 0.5000 0.0000 0.5000 1.0000 0.5000 0.0000
You cannot put the squaring operator between the name of the function (sin) and its input argument x.