The law of cosines can only be applied to right triangles. true or false.

( False)

Step-by-step explanation :

Law of cosine : a²+b²−2ab cos(c) =c² .

For right triangle c = 90 degree So, the term 2ab cos(c) would be zero ,

Therefore,( False) the law of cosines can not only be applied to right triangles.

add an !

step-by-step explanation:

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,