True or False? The expression cos^-1 (3/5) has an infinite number of values.

The expression cos^-1 (3/5) has an infinite number of values is a true

Step-by-step explanation:

We are given a expression as:

Let us equate this expression to be equal to some angle theta(θ)

i.e.

Let

As we know that the limit point of the cosine  function is [-1,1]

i.e. it takes the value between -1 to 1 and including them infinite number of times.

Also,

-1< 3/5 <1

This means that the cosine function takes this value infinite number of times.

That is there exist a infinite number of theta(θ) for which:

i.e. the expression:

has infinite number of values.

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐