en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

3cos^2(pi/4)

Solution

3 cos^{2} (\frac{π}{4})

Solution

\frac{3}{2}

+1

Solution steps

3 cos^{2} (\frac{π}{4})

Use the following trivial identity:

cos (\frac{π}{4}) = \frac{2}{2}

= 3 (\frac{2}{2})^{2}

Simplify

3 (\frac{2}{2})^{2} : \frac{3}{2}

= \frac{3}{2}

Popular Examples

cos(pi/(12))+cos((7pi)/(12))

cos (\frac{π}{12}) + cos (\frac{7 π}{12})

(2sqrt(5))cos(26.5650400000000…)

(25) cos (26.5650400000000 \dots^{\circ})

tan(20)tan(40)tan(80)

tan (2 0^{\circ}) tan (4 0^{\circ}) tan (8 0^{\circ})

arcsin (- 1.98)

tan (3) (\frac{π}{4})

Frequently Asked Questions (FAQ)

What is the value of 3cos^2(pi/4) ?
The value of 3cos^2(pi/4) is 3/2