Find the exact value of the trigonometric expression without the use of a calculator.If sin ? = 
, 0 < ? < 
and cos ? = 
, 0 < ? < 
, find the exact value of cos (? + ?).
A. - 
B. 
C. - 
D. 
Answer: C
Mathematics
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Find two paths of approach from which one can conclude that the function has no limit as (x, y) approaches (0, 0).f(x, y) = 
What will be an ideal response?
Mathematics
Identify the leading term and leading coefficient of the polynomial.-a + 7a3 - 4a7 + 5a2
A. -4a7, -4 B. 5a2, 5 C. 7a3, 7 D. -a, -1
Mathematics
State the phrase as a mathematical expression. Use x to represent the variable.A number increased by eleven
A. 11 B. x - 11 C. x + 11 D. 11x
Mathematics
Determine whether the variation between the indicated quantities is direct or inverse.The number of hours worked by an hourly worker and the amount of her paycheck
A. Inverse B. Direct
Mathematics