In the triangle shown, determine A to the nearest degree

63 degrees

Step-by-step explanation:

Cosine A= 6/13

Cosine^-1 (6/13) = A

A= 63 degrees

45 degree

Step-by-step explanation:

all interior angles add to 180 on a triangle, you already have 90 degrees in one corner leaving 90 degrees to play with divide by two and you get 45

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,