Question

Find approximate value of cos 11π/36, knowing the value of cos π/3.

Answer 1

Answer:

The approximate$cos\frac{11 \pi}{36} = 0.5$

Step-by-step explanation:

As per the question,

We have to find the value of $cos\frac{11 \pi}{36}$ with the use of $cos\frac{\pi}{3}$ .

According to the trigonometric data,

The value of $cos\frac{\pi}{3} = \frac{1}{2} = 0.5$

Now we can write that $cos\frac{11 \pi}{36}$ is approximately to  $cos\frac{12 \pi}{36}$.

That is,

The value of $cos\frac{12 \pi}{36} = cos\frac{\pi}{36}$

or,

$cos\frac{12 \pi}{36} = 0.5$

Therefore,

The approximate value of $cos\frac{11 \pi}{36} = 0.5$

Answer 2

Answer:

Step-by-step explanation: