Answer:
cosB = 2√6 / 7
Step-by-step explanation:
use the pythagorean theorem to find the missing side
a² + b² = c²
a² + 5² = 7²
a² + 25 = 49
a² = 24
a = √24
a = 2√6
--------------------------
cosB = adj/hyp
cosB = 2√6 / 7
Answer:
this is simple... 1 3/4
Step-by-step explanation:
You know the tangent point, so all you need for the tangent line equation is the slope. That is given by the derivative at x=3.
The derivative is
y' = 3x^2 -2
At x=3, this is y' = 3(3²) -2 = 25
Then your line in point-slope form is
y -22 = 25(x -3)
The answer is 66.67% because 2/3 equals .6667. Hope this helps mate :)