Answer:
Part A) 
Part B) 
Part C) 
Step-by-step explanation:
see the attached figure to better understand the problem
step 1
Find the length side AB (hypotenuse of the right triangle)
Applying the Pythagorean Theorem

substitute the given values



simplify

step 2
Find sin(A)
we know that
In the right triangle ABC
----> by SOH (opposite side divided by the hypotenuse)
substitute the given values

step 3
Find tan(B)
we know that
----> by TOA (opposite side divided by adjacent side)
substitute the values

step 4
Find sec(A)
we know that

----> by CAH
so

substitute the values

simplify

A trinomial consists of 3 variables. Hence the answer will be A. C2 + C + 6
Answer:
11
Step-by-step explanation:
25 than you divided 5 + 2 than you multiply 3 and you get
Answer:
Step-by-step explanation:
Given is a function f in two variables as

To find critical points of the given function and also to find max, min or saddle point.
Find the partial derivatives



Equate first derivatives to 0
Adding fx and fy we get

x=±y
Only real roots are (x,y) =(3,3) and (-3,-3)

(3,3) is a saddle point

(-3,-3) is also a saddle point.