Solution

Solution

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

-csc^2(pi/4)cot(90)cos(θ)= 4/5cos((15pi)/4)cos(θ)=(sqrt(2))/2

Frequently Asked Questions (FAQ)

  • What is the value of sin(270) ?

    The value of sin(270) is -1