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how do i use cos-1

 Nov 29, 2016
 #1
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no idea

 Nov 29, 2016
 #2
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how do i use cos-1

 

cos1 is the key for the arccos function on the computer.  laugh  !

 

Outside the calculator is     cos1(x)=1cos(x)    laugh  !

 Nov 29, 2016
edited by asinus  Nov 29, 2016
 #3
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Depends on your calculator.

 

cos-1 is for when you dont know what the angle is but you are given the adjacent and hypotenuse values.

For example if the hypotenuse is 10 and the adjacent is 5 you would input.

cos-1(5/10) = 60 degrees

 Nov 29, 2016

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