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Deriving the value of cosine

What is the exact value of Cos300° using unit circle?

$-\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}$

$\frac{1}{2}$

What is the exact value of Cos150° using unit circle?

$-\frac{\sqrt{3}}{2}$

$\frac{1}{2}$

$\frac{1}{\sqrt{2}}$

What is the exact value of Cos330° using unit circle?

$-\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}$

$-\frac{1}{2}$

What is the exact value of Cos45° using unit circle?

$-\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}$

$\frac{1}{\sqrt{2}}$

What is the exact value of Cos240° using unit circle?

$-\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}$

$-\frac{1}{2}$

What is the exact value of Cos225° using unit circle?

$-\frac{\sqrt{3}}{2}$

$-\frac{1}{\sqrt{2}}$

$\frac{1}{2}$

What is the exact value of Cos210° using unit circle?

$-\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}$

$-\frac{1}{2}$

What is the exact value of Cos60° using unit circle?

$-\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}$

$\frac{1}{2}$

What is the exact value of Cos30° using unit circle?

$-\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}$

$\frac{1}{2}$

What is the exact value of Cos135° using unit circle?

$-\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}$

$\frac{-1}{\sqrt{2}}$

Questions

Time

Score

Deriving the value of cosine

What is the exact value of Cos300° using unit circle?

﻿−32-\frac{\sqrt{3}}{2}−23​​﻿

﻿32\frac{\sqrt{3}}{2}23​​﻿

﻿12\frac{1}{2}21​﻿

What is the exact value of Cos150° using unit circle?

﻿−32-\frac{\sqrt{3}}{2}−23​​﻿

﻿12\frac{1}{2}21​﻿

﻿12\frac{1}{\sqrt{2}}2​1​﻿

What is the exact value of Cos330° using unit circle?

﻿−32-\frac{\sqrt{3}}{2}−23​​﻿

﻿32\frac{\sqrt{3}}{2}23​​﻿

﻿−12-\frac{1}{2}−21​﻿

What is the exact value of Cos45° using unit circle?

﻿−32-\frac{\sqrt{3}}{2}−23​​﻿

﻿32\frac{\sqrt{3}}{2}23​​﻿

﻿12\frac{1}{\sqrt{2}}2​1​﻿

What is the exact value of Cos240° using unit circle?

﻿−32-\frac{\sqrt{3}}{2}−23​​﻿

﻿32\frac{\sqrt{3}}{2}23​​﻿

﻿−12-\frac{1}{2}−21​﻿

What is the exact value of Cos225° using unit circle?

﻿−32-\frac{\sqrt{3}}{2}−23​​﻿

﻿−12-\frac{1}{\sqrt{2}}−2​1​﻿

﻿12\frac{1}{2}21​﻿

What is the exact value of Cos210° using unit circle?

﻿−32-\frac{\sqrt{3}}{2}−23​​﻿

﻿32\frac{\sqrt{3}}{2}23​​﻿

﻿−12-\frac{1}{2}−21​﻿

What is the exact value of Cos60° using unit circle?

﻿−32-\frac{\sqrt{3}}{2}−23​​﻿

﻿32\frac{\sqrt{3}}{2}23​​﻿

﻿12\frac{1}{2}21​﻿

What is the exact value of Cos30° using unit circle?

﻿−32-\frac{\sqrt{3}}{2}−23​​﻿

﻿32\frac{\sqrt{3}}{2}23​​﻿

﻿12\frac{1}{2}21​﻿

What is the exact value of Cos135° using unit circle?

﻿−32-\frac{\sqrt{3}}{2}−23​​﻿

﻿32\frac{\sqrt{3}}{2}23​​﻿

﻿−12\frac{-1}{\sqrt{2}}2​−1​﻿

Incorrect

Great!

$-\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}$

$\frac{1}{2}$

$-\frac{\sqrt{3}}{2}$

$\frac{1}{2}$

$\frac{1}{\sqrt{2}}$

$-\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}$

$-\frac{1}{2}$

$-\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}$

$\frac{1}{\sqrt{2}}$

$-\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}$

$-\frac{1}{2}$

$-\frac{\sqrt{3}}{2}$

$-\frac{1}{\sqrt{2}}$

$\frac{1}{2}$

$-\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}$

$-\frac{1}{2}$

$-\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}$

$\frac{1}{2}$

$-\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}$

$\frac{1}{2}$

$-\frac{\sqrt{3}}{2}$

$\frac{\sqrt{3}}{2}$

$\frac{-1}{\sqrt{2}}$