Solution
Solution
+1
Decimal Notation
Solution steps
Rewrite using trig identities:
Use the Angle Difference identity:
Rewrite as
Apply the periodicity of :
Rewrite as
Apply the periodicity of :
Use the following trivial identity:
periodicity table with cycle:
Use the following trivial identity:
periodicity table with cycle:
Use the following trivial identity:
periodicity table with cycle:
Use the following trivial identity:
periodicity table with cycle:
Simplify
Popular Examples
Frequently Asked Questions (FAQ)
What is the value of cos(2pi-pi/4) ?
The value of cos(2pi-pi/4) is (sqrt(2))/2