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How to type sin function with square

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John Sanjai J
John Sanjai J 2023-11-20
回答： Steven Lord 2023-11-21
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?

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采纳的回答

Sam Chak
Sam Chak 2023-11-20
Ran in:
@John Sanjai J, are you expecting this?
syms x
expr = sin(x)^2
expr = 
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显示 3更早的评论
Sam Chak
Sam Chak 2023-11-21
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
Walter Roberson 2023-11-21
Ran in:
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)'

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更多回答（1 个）

Steven Lord
Steven Lord 2023-11-21
Ran in:
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.

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