Solution
Solution
+1
Degrees
Solution steps
Rewrite using trig identities
Rewrite using trig identities
Rewrite as
Use the Angle Sum identity:
Use the Double Angle identity:
Simplify
Apply exponent rule:
Add the numbers:
Use the Double Angle identity:
Use the Pythagorean identity:
Expand
Expand
Apply the distributive law:
Simplify
Apply exponent rule:
Add the numbers:
Multiply:
Expand
Apply the distributive law:
Apply minus-plus rules
Simplify
Multiply the numbers:
Apply exponent rule:
Add the numbers:
Simplify
Group like terms
Add similar elements:
Add similar elements:
Simplify
Divide both sides by
Divide both sides by
Divide both sides by
Simplify
Apply rule
General solutions for
periodicity table with cycle:
Popular Examples
Frequently Asked Questions (FAQ)
What is the general solution for 3cos(x)+cos(3x)=0 ?
The general solution for 3cos(x)+cos(3x)=0 is x= pi/2+2pin,x=(3pi)/2+2pin