Prove the identity.tan2x ? sin2x = tan2x - sin2x
What will be an ideal response?
Answers may vary. One possible solution is:
tan2x ? sin2x = (sec2x - 1)sin2x = tan2x - sin2x
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Answer the question appropriately.Find the linearization of f(x) = sin x at x = 2. Round the coefficients to 2 decimal places.
A. L(x) = -0.42x + 0.07 B. L(x) = -0.42x +1.74 C. L(x) = 0.42x + 0.49 D. L(x) = cos x
Solve the problem. A reasonable quadratic model for the population of a certain city is found to be 
where B(t) is the population (in thousands) of the city in the year that is t years since 1990. A reasonable quadratic model for the number of residents of that city who were born outside the United States is 
where F(t) is the number (in thousands) of foreign-born residents of the city in the year that is t years since 1990. Let P(t) be percentage of residents of the city who were born outside the United States in the year that is t years since 1990. An
equation for P is P(t) = 
. Use P to predict when the city will have 13.4% foreign-born residents.
A. 2005
B. 2006
C. 2004
D. 2003
Use the graph below to answer the question.
Is vertex F adjacent to vertex G?
A. no B. yes
What is the value of e when e = 14.6 sin 2ã ft, f = 4 MHz, and t = 0.04 æsec?
a. 14.6 v b. 3.9 v c. -1.8 v d. -7.6 v e. 12.3 v