Find the exact value of the trigonometric expression without the use of a calculator.If sin ? = - 
, 
< ? < 2? and tan ? = - 
, 
< ? < ?, find the exact value of cos (? + ?).
A. 
B. 
C. - 
D. 
Answer: D
Mathematics
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Write the number as a binary number.2578
A. 11,110,1012 B. 100,010,1002 C. 101,010,0002 D. 10,101,1112
Mathematics
Use Descartes' Rule of Signs to determine the possible number of positive real zeros and the possible number of negative real zeros for the function.f(x) = 3x3 - 7x2 + 4x + 6
A. 0 or 1 positive; 0 or 1 negative B. 0 or 2 positive; 1 negative C. 0 or 1 positive; 2 negative D. 0 positive; 1 or 2 negative
Mathematics
Find the angle of least positive measure that is coterminal with the given angle.
A. - 
B. 
C. 
D. 
Mathematics
Solve the problem.A force of 144 lb acts in the direction N 45° E. Find its east and north components.
A. 72
east; 72 north
B. 72 east; 72
north
C. 72 east; 72 north
D. 72
east; 72
north
Mathematics