Triangle ABC is a right triangle with sides of lengths a, b, and c and a right angle at C. Find the indicated trigonometric function value of A. Rationalize denominators containing radicals.a = 10, b = 7; find cos A.
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Answer the question.Force transfer due to tightening a bolt in a sleeve produces stresses B psi in the bolt and S psi in the sleeve related by:
Are the stresses B = 9000 psi and S = 600?
A. Yes B. No C. Cannot be determined
Mathematics
Perform the indicated operation and write the answer in lowest terms. 
? 10
A. 
B. 
C. 
D. 
Mathematics
Solve the system by the addition method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(-5, 8)} B. {(-4, 7)} C. {(4, 8)} D. no solution; ?
Mathematics
Use the definition of equality of complex numbers to find the real numbers x and y such that the equation is true.7 + xi = y + 4i
A. x = 7, y = 3 B. x = 7, y = 4 C. x = 4, y = 7 D. x = 3, y = 7
Mathematics