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(tan(-(4pi)/9))100cos(70)(sin(40)-sin(20))/(cos(40)-cos(20))cos(pi/6)cos(pi/6)-sin(pi/6)sin(pi/6)(24sin(22))/(sin(40))

Frequently Asked Questions (FAQ)

  • What is the value of cos(1020) ?

    The value of cos(1020) is 1/2