Solution
Solution
Solution steps
Use the basic trigonometric identity:
Use the following trivial identity
periodicity table with cycle:
Popular Examples
simplify cos(-pi/2-x)simplify cos(-u)simplify sin(x-3pi)simplify (cos(npi))/nsimplify 5csc^2(-5-2csc(x)+2)
Frequently Asked Questions (FAQ)
What is cos(npi)+cos(pi) ?
The solution to cos(npi)+cos(pi) is -1+(-1)^n