Prove that the equation is an identity.
= - cos12k cot 2k
What will be an ideal response?
= 
[sum-to-product identities]
= - 
? 
= - cos(12k) cot (2k)
Mathematics
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Solve the problem.How many different 4-letter radio-station call letters can be made if the first letter must be K or W, repeats are allowed, but the call letters cannot end in an O?
A. 456,976 B. 16,900 C. 33,800 D. 35,152
Mathematics
Find the center and radius of the circle.x2 + y2 = 64
A. Center: (0, 0); radius: 64 B. Center: (1, 1); radius: 64 C. Center: (1, 1); radius: 8 D. Center: (0, 0); radius: 8
Mathematics
Find the average of the list of numbers.-13, -7, -3, -4, 0, -9
A. -4 B. -6 C. -7 D. -5
Mathematics
Provide an appropriate response.For what values of a does the quadratic function f(x) = ax2 + 4x + 5 have two x-intercepts?
A. a > 
B. a > 
C. a < 
D. a < 
Mathematics