# How do you find the exact value of cos 33pi/4?

Then teach the underlying concepts
Don't copy without citing sources
preview
?

#### Explanation

Explain in detail...

#### Explanation:

I want someone to double check my answer

7
Alan P. Share
Dec 7, 2015

$\cos \left(\frac{33 \pi}{4}\right) = \frac{\sqrt{2}}{2}$

#### Explanation:

$\frac{33 \pi}{4}$ is equivalent to $\frac{32 \pi}{4} + \frac{\pi}{4} = 2 \cdot \left(2 \pi\right) + \frac{\pi}{4} = \frac{\pi}{4} \textcolor{w h i t e}{\text{XX}}$(since $2 \pi = 0$, a complete circle)

$\cos \left(\frac{\pi}{4}\right) = \frac{1}{\sqrt{2}} = \frac{\sqrt{2}}{2} \textcolor{w h i t e}{\text{XXX}}$(this is one of the standard angles)

• 9 minutes ago
• 10 minutes ago
• 11 minutes ago
• 12 minutes ago
• A minute ago
• A minute ago
• 4 minutes ago
• 7 minutes ago
• 8 minutes ago
• 8 minutes ago
• 9 minutes ago
• 10 minutes ago
• 11 minutes ago
• 12 minutes ago