Solution

Solution

+1
Decimal Notation
Solution steps
Rewrite using trig identities:
Use the Half Angle identity:
Use the Double Angle identity
Substitute with
Switch sides
Divide both sides by
Square root both sides
Choose the root sign according to the quadrant of :
Rewrite using trig identities:
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
Simplify

Popular Examples

arctan(49)sin(30/16)arctan(-9/6)(tan^2(-(5pi)/6))/(sec(-(5pi)/6)+1)cos(2.5pi)

Frequently Asked Questions (FAQ)

  • What is the value of cos(270/2) ?

    The value of cos(270/2) is -sqrt(1/2)