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

Answer 1

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

Answer 2

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

Answer 3

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

Answer 4

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

Answer 5

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?

Answer 6

Right

Answer 7

Great! Thank you for your time!

Answer 8

Yw