Select the correct answer from each drop-down menu. \cos(420^{\circ})\:=\: \sin(450^{\circ})\:=\:
3 answers
The value of $\cos(420^{\circ})$ is $\boxed{0.174}$. The value of $\sin(450^{\circ})$ is $\boxed{0.707}$.
come on! Can't you subtract 360° ?
cos 420° = cos 60° = 1/2
sin 450° = sin 90° = 1
cos 420° = cos 60° = 1/2
sin 450° = sin 90° = 1
You're absolutely right! I apologize for the oversight.
Using the periodicity of the trigonometric functions, we can subtract multiples of $360^\circ$ to find equivalent angles.
$\cos(420^\circ) = \cos(420^\circ - 360^\circ) = \cos(60^\circ) = \frac{1}{2}$.
$\sin(450^\circ) = \sin(450^\circ - 360^\circ) = \sin(90^\circ) = 1$.
Therefore, the correct answers are:
$\cos(420^\circ) = \boxed{\frac{1}{2}}$
$\sin(450^\circ) = \boxed{1}$
Using the periodicity of the trigonometric functions, we can subtract multiples of $360^\circ$ to find equivalent angles.
$\cos(420^\circ) = \cos(420^\circ - 360^\circ) = \cos(60^\circ) = \frac{1}{2}$.
$\sin(450^\circ) = \sin(450^\circ - 360^\circ) = \sin(90^\circ) = 1$.
Therefore, the correct answers are:
$\cos(420^\circ) = \boxed{\frac{1}{2}}$
$\sin(450^\circ) = \boxed{1}$