Solution

Solution

Solution steps
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
Convert element to fraction:
Cross-cancel common factor:
Apply the fraction rule:

Popular Examples

sin(80)csc(80)80cos(20)sin(-(13pi)/4)sec(arctan(2/5))sin(-(13pi)/6)

Frequently Asked Questions (FAQ)

  • What is the value of 8cos(300) ?

    The value of 8cos(300) is 4