what is the difference between cos(8) and cosd(8)

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Stark Volt
Stark Volt 2022-2-22
评论： necdet batuhan 2024-2-21
I write an equation related to using cosine, sine, tangent but everytime I run mathlab show me a negative result but when I use calculator it is a positive and giving me correct number. so after a little bit digging and I find that it has something to do with cos, sin, tan, cosd, sind, tand what the difference having d or withouth d?
cos(8)
cosd(8)
sin(20)
sind(20)
tan(30)
tand(30)

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采纳的回答

Voss
Voss 2022-2-22
编辑：Voss 2022-2-22
Ran in:
With the d, the input angle is interpreted as being in degrees. Without the d, it's in radians.
Example, these two commands will produce the same output:
cos(pi/4) % pi/4 radians = 45 degrees
ans = 0.7071
cosd(45)
ans = 0.7071

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