Use the given information to find the exact value of the trigonometric function.sin ? = - 
, ? lies in quadrant IV
Find cos 
.
A. - 
B. 
C. 
D. - 
Answer: A
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Find the indicated derivative. Assume that x is restricted so that ln is defined.
if y = ln 
A. ln 
B. 
C. 
D. 
Determine if the statement is a proportion.I. 
II. 
A. I is a proportion, II is not a proportion. B. I is not a proportion, II is a proportion. C. I and II are both proportions. D. Neither I nor II are proportions.
Solve the equation.x = log5 
A. 
B. {10}
C. 
D. 
Secret messages can be encoded by using a code and an encoding matrix. If we have the code: 
and an encoding matrix: E = 
, we can encode a message by taking every two letters of the message, converting them to their corresponding numbers, creating a 
/> matrix, and then multiplying each two numbers by E. Use the code and encoding scheme above and an additional encoding matrix, F = 
, to answer the question.If the letters to be encoded are L = 
, show that E(FL) = (EF)L.
What will be an ideal response?