Question

if f(X) = cos{π²}X + cos{-π}X, then write the value of f(π)​

Answer 1

Answer:

⇒ f(π) = cos (π³) + cos (-π²)

Step-by-step explanation:

Given :

f(x) = cos (π²)x + cos (-π)x

Then, find the value of,

f(π)

Solution :

We know that,

f(x) = cos (π²)x + cos (-π)x

Here, we've got x ,.

(As underlined)

f(x) = cos (π²)x + cos (-π)x

According to question,

We want it  (π) instead of (x),

So, We interchnge the terms,

We get,

f(π) = cos (π²)π + cos (-π)π

⇒ f(π) = cos (π² × π) + cos (-π × π)

⇒ f(π) = cos (π³) + cos (-π²)

Answer 2

Answer:

your answer in given pic

Step-by-step explanation:

I hope it's help you