The equation cos (35°) = can be used to find the length of one side of a triangle It could be the length of the altitude or the length of the base depending of which the angle 35° was assigned. But in order for us to proceed with the calculation, we also need the length of the hypotenuse since cos (x) are<span> equal to the length of the adjacent side divided by the hypotenuse. The answer is 20.5 </span>
Answer:
The exact value of 
Step-by-step explanation:
we know that
The angle
belong to the fourth quadrant
The function cosine is positive in the first and in the fourth quadrant
so

Remember that

so

Answer:
A
Step-by-step explanation:

Cross multiply,
9*12 = x*3

x = 3*12
x = 36