How to type sin function with square

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?

Answer 1

[Sam Chak]

@John Sanjai J, are you expecting this?

syms x
expr = sin(x)^2

expr = 

[John Sanjai J]

is equivalent to sin^2 *( x ) or sin(x^2)

[Sam Chak]

If you want to be safe then use parenthesis:

syms x
expr = (sin(x))^2

expr = 

sin(pi/4)^2 % should return (1/√2)² = 1/2

ans = 0.5000

[John Sanjai J]

please read the question carefully. It's not what I meant

[Sam Chak]

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]

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)'

Answer 2

[Steven Lord]

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.