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confused on how to code this

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Brendan Jozwiak
Brendan Jozwiak 2022-8-25
回答： Image Analyst 2022-8-26
(a) Create a variable named theta. Assign an angle of to it.
Prove the trigonometric identity sin^2(theta)+cos^2(theta)=1
Here the is the variable ‘theta’ you created.
(b) Convert theta into degrees and store in a new variable theta_d and then repeat (a) to prove the trigonometric identity again. (Do not use function deg2rad).
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Chunru
Chunru 2022-8-26
theta = pi/2 instead of theta=angle(pi/2). Angle is a function to find the phase angle of a complex number. For a real number pi/2, the "angle" is 0.

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回答（2 个）

Walter Roberson
Walter Roberson 2022-8-25
编辑：Image Analyst 2022-8-26
Use sin(theta)^2
360 degrees = 2π radians
divide by 2π
360/(2π) degrees = 1 radian
so x radians = 360/(2π) * x degrees
In matlab π is pi
Image Analyst
Image Analyst 2022-8-26
To convert theta into degrees
theta_d = theta * 180 / pi
To use trig functions on degrees, use the "d" version, for example sind instead of sin
sind(theta_d) ^ 2

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