In a triangle the length of two sides are 1.9m and 0.7 m. What is the length of the third side, if you know that it should be a whole number?

Ahypothesis is: a the average squared deviations about the mean of a distribution of values b) an empirically testable statement that is an unproven supposition developed in order to explain phenomena a statement that asserts the status quo; that is, any change from what has been c) thought to be true is due to random sampling order da statement that is the opposite of the null hypothesis e) the error made by rejecting the null hypothesis when it is true

Which equation can be solved to find x the measure of jk in the apex

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me