Given a = 12, b = 11 and c = 8 use the Law of Cosines to solve the triangle for the value of C. Round answer to two decimal places.





A) 60.33°

B) 40.42°

C) 80.44°

D) 63.06°

E) 76.53°


B) 40.42°

Mathematics

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Find the exact value by using a half-angle identity.cos 

A.  
B. -    
C.  
D. -  

Mathematics

Round the number to the nearest ten, nearest hundred, and nearest thousand.39,662

A.

Ten39,660
Hundred39,700
Thousand40,000

B.
Ten39,660
Hundred39,670
Thousand39,000

C.
Ten39,670
Hundred39,700
Thousand40,000

D.
Ten39,670
Hundred39,600
Thousand39,000

Mathematics

Perform the indicated operation. Write the answer in simplest form. If the answer is an improper fraction, write it as a mixed number.

A. 8 
B. 7 
C. 7 
D. 7 

Mathematics

For the given functions f and g, find the requested composite function.f(x) = x2 - 4, g(x) = x2 - 1;Find (f ? g)(x).

A. x4 + 15 B. x4 - 8x2 + 15 C. x4 - 3 D. x4 - 2x2 - 3

Mathematics