Solution

Solution

+1
Decimal Notation
Solution steps
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

cos(2x)=(sqrt(3))/2 ,0<= x<= 2piarcsin(4/5)cos(x)= 3/4csc(pi/4)prove (cos(2x)-cos(4x))/(sin(2x)+sin(4x))=tan(x)prove

Frequently Asked Questions (FAQ)

  • What is the value of cos(330) ?

    The value of cos(330) is (sqrt(3))/2