The cos value when angle of a right triangle equals to $90^°$ is called cosine of angle $90$ degrees. Mathematically, it is written as $\cos{(90^°)}$ as per sexagesimal system.

$\cos{(90^°)} \,=\, 0$

The cosine of angle $90$ is exactly equal to zero and it is often called as trigonometric ratio (or function) of standard angle.

The $\cos{(90^°)}$ can be written alternatively in two different forms. It is written as $\cos{\Big(\dfrac{\pi}{4}\Big)}$ in circular system and also written as $\cos{(100^g)}$ in centesimal system.

$(1) \,\,\,$ $\cos{\Big(\dfrac{\pi}{2}\Big)} \,=\, 0$

$(2) \,\,\,$ $\cos{(100^g)} \,=\, 0$

Now, learn how the exact value of cos of angle $90$ degrees is equal to zero mathematically in trigonometry.

Latest Math Topics

Apr 18, 2022

Apr 14, 2022

Apr 05, 2022

Mar 18, 2022

Mar 05, 2022

Latest Math Problems

Apr 06, 2022

Mar 22, 2022

A best free mathematics education website for students, teachers and researchers.

Learn each topic of the mathematics easily with understandable proofs and visual animation graphics.

Learn how to solve the maths problems in different methods with understandable steps.

Copyright © 2012 - 2021 Math Doubts, All Rights Reserved