Use the given information to find the exact value of the trigonometric function.sin ? = - , ? lies in quadrant IVFind cos .

A. - 
B.
C.
D. - 


Answer: A

Mathematics

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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.

Mathematics

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.

Mathematics

Solve the equation.x = log5 

A.
B. {10}
C.
D.

Mathematics

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?

Mathematics