Lentubosid
Answered

what is the answer of the trigonometric equation of 2 cos X + 1= 0

Sagot :

Jers15id
2cos(x)+1=0
First subtract both sides by 1
2cos(x)=-1
Divide both sides by 2
cos(x)=[tex]\frac{1}{2}[/tex]
x=cos^-1(-1/2)
x=120

The value of the x is 120. Hope this helps =)