Solution

Solution

+1
Decimal Notation
Solution steps
Rewrite as
Apply the periodicity of :
Rewrite using trig identities:
Write as
Use the Angle Sum identity:
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

arctan(-3/3)1/(cos^2(45))4cos(290)2cos(40)arccos(0.73)

Frequently Asked Questions (FAQ)

  • What is the value of cos(1380) ?

    The value of cos(1380) is 1/2