Trigo - #2

Geometry Level 1

$\large \sqrt{ \cos(30^\circ) } =$

Answer upto two decimal places .

2 solutions

Mahdi Raza
Jun 21, 2020

$\sqrt{\cos{(30^{\circ})}} = \sqrt{\dfrac{\sqrt{3}}{2}} \approx \boxed{0.93}$

Lion Soul
Oct 27, 2015

Radian = angle x $\frac{π}{180}$

Therfore ${30}^{•}$ = $30\times \frac{π}{180} = \frac {π}{6}$

Cos( $\frac{π}{6}$ )= 0.866

$\sqrt {0.866}$ = 0.93

In the problem it is given degrees but in the solution it is radians. The answer should be $\sqrt{\dfrac{\sqrt{2}}{2}}\approx0.89$

Am I wrong somewhere?

Vinayak Srivastava - 1 year ago