The expression cos^-1(3/5) has an infinite number of values.
***Note: This is a relation, not a function***

A. True
B. False

Question

The expression cos^-1(3/5) has an infinite number of values.
***Note: This is a relation, not a function***

A. True
B. False

welshfella · Answer

This means the angles whose cosine is 3/5
 - what do you think?

anonymous · Answer

I think that it might be false because there can be only be one angle where the value is 3/5?

welshfella · Answer

No there can be more 
The cosine has a positive value in the first and the fourth quadrants and that's only one revolution 0-360 degrees

welshfella · Answer

So there are 2 angles with cos of 3/5 in one rev

anonymous · Answer

Oh ok! So we can have an infinite amount of values for this relation right? Becuase if we keep going, there are more values as we go?

welshfella · Answer

Right

anonymous · Answer

Great! Thank you for your time!

welshfella · Answer

Yw