Question

True or False?

The value pi/4 is a solution for the equation 3√2 cos θ +2=-1.

***My Answer: False***
Is this correct?

Answer 1

well, you basically need to check the equality, so replacing gives cos(pi/4)=sqrt(2)/2
then 3root(2)*root(2)/2+2=3*1+2=5 and not 1.

Answer 2

so you are correct

Answer 3

I see now! Thank you for the help!