Which of the following structures is part of a countercurrent heat exchanger?

The vessels that branch off the aorta and supply the heart itself with blood are called the _______________________  arteries. *Type in all lowercase letters. *Do not add any spaces or punctuation before or after the word.

(10 points) Find the exact value of: cos(tan-1(125)+cos-1(-45))

Establish the identity (10 points) (sin A + cos B )2 + (cos B + sin A)(cos B – sin  A) = 2(cos B)(sin A + cos B)

Submit Unit 2 Exam AnswerDocument here

  Solve the following equation for ALL SOLUTIONS:   (10 points) tan(x) = 2 sin(x)  

Evaluate   (If you see an error in the formatting – you are evaluating the Fifth root of the complex number that matches the coordinate from the previous problem). Leave all of your answers in polar form. Please note that the answer to the previous question is helpful for this problem!

(2 points each)  Find all solutions for the equations below (write the general solutions for each).  No calculator! a) sec(x)=2 b) cot(x)=33

(10 pts) Pat was given

Write the augmented matrix representing the following system of equations.  Then, using a calculator, write the matrix in reduced row echelon form and write the solution to the system. Write everything with simplified, improper fractions.   2x+ 9y +10z+7w =11   x  -y +z+  w = -33 x + 2y -11z+2w = 1   x + 3y + 4z+4w = 0