Solution
Solution
Solution steps
Use the following trivial identity:
periodicity table with cycle:
Simplify
Popular Examples
sin(x)= 1/2cos(x)=-0.4prove (sin(x)+cos(x))^2=1+sin(2x)prove 2cos^2(θ)-cos(θ)=1sec^2(θ)-4=0,0<= θ<= 2pi
Frequently Asked Questions (FAQ)
What is the value of 2cos(0) ?
The value of 2cos(0) is 2