Suppose a triangle has two sides of length 42 and 35, and that the angle between these two sides is 120°. Which equation should you solve to find the length of the third side of the triangle?

D is the correct answers

Step-by-step explanation:

If we know two sides and an included angle of any triangle, we can use law of cosines to find the unknown length of the third side

f(2x−x2)=−3x2+6x−1

step-by-step explanation:

set up the composite function and evaluate.

f(2x−x2)=−3x2+6x−1