Question

What is the value of cos2npi

Answer 1

In General,

Cos(ѳ)=cos(2nπ+ѳ) where n is any integer

here ѳ=0,
cos(2nπ) =1

Answer 2

The value is $\cos 2n\pi=1$

Step-by-step explanation:

To find : The value of $\cos 2n\pi$ ?

Solution :

The expression is $\cos 2n\pi$

Substitute the value of n=0,1,2,3,...

When n=0,  

$\cos 2(0)\pi=\cos 0=1$

When n=1,  

$\cos 2(1)\pi=\cos 2\pi=1$

When n=2,  

$\cos 2(2)\pi=\cos 4\pi=1$

..... i.e. for all values of n

$\cos 2n\pi=1$

Therefore, the value of expression is $\cos 2n\pi=1$

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Trigonometry

https://brainly.in/question/7623361, Answered by ARUNSINH