Find the exact value of the expression. Do not use a calculator.tan 
- cos 
A. - 
B. - 
C. 
D. 
Answer: A
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Provide an appropriate response.Graph f(x) = cos-1 
and g(x) = tan-1 
. Explain why the graph looks like it does.
What will be an ideal response?
Determine whether the graph shown is the graph of a polynomial function.
A. polynomial function B. not a polynomial function
Write an algebraic expression to answer the question and simplify.An investor buys 90 shares of stock for d dollars per share. The next day two other investors each buy the same number of shares, but the price has risen by $2 per share. How much have the three investors spent?
A. 90d + 2 ? 90d + 4; 270d + 4 dollars B. 90d + 90(d + 2); 180d + 180 dollars C. 90d + 2 ? 90(d + 2); 270d + 360 dollars D. Cannot be solved
Rationalize the denominator. Assume that all variables represent positive real numbers.
A. 8x
B. 
C. 
D. 