find the value of cos(-270 degrees)

[travis19]

find cos(-270)

a undefined
b -1
c 1
d 0

 

[mmm4444bot]

If you tell me the value of cos(90°), then I will tell you the answer to this exercise.

 

[Aladdin]

Re: cos(-270)

cos(-270)=cos(270).
Use the calculator.
cos (270)

 

[Deleted member 4993]

Re: cos(-270)

....
Use the calculator.
.........
Aladdin, if you need to use a calculator for this problem - you'll not be a "good" engineer. Engineers should be always ready to estimate - then check with calculator.

 

[Aladdin]

Re: cos(-270)

....
Use the calculator.
.........
Aladdin, if you need to use a calculator for this problem - you'll not be a "good" engineer. Engineers should be always ready to estimate - then check with calculator.

I will from now on estimat and check on the calculator ( Promise :wink: )