The point P(x, y) on the unit circle that corresponds to a real number t is given. Find the values of the indicated trigonometric function at t.
?Find sec t.
A. 
B. 
C. 
D. 
Answer: D
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Find all the second order partial derivatives of the given function.f(x, y) = cos xy2
A. fxx(x, y) = y2 sin xy2; fyy(x, y) = 2[2y2 cos (xy2) - sin (xy2)] ; fyx(x, y) = fxy(x, y) = 2y[y2 cos (xy2) - sin (xy2)]
B. fxx(x, y) = -y4 cos xy2; fyy(x, y) = - 2x[2xy2 cos (xy2) + sin (xy2)]; fyx(x, y) = fxy(x, y) = - 2y[xy2 cos (xy2) + sin (xy2)];
C. fxx(x, y) = - y2 sin xy2; fyy(x, y) = 2[ sin (xy2)- 2y2 cos (xy2)] ; fyx(x, y) = fxy(x, y) = 2y [sin (xy2)-y2 cos (xy2)]
D. fxx(x, y) = - y2 sin xy2; fyy(x, y) = 2y
; fyx(x, y) = fxy(x, y) = 2
Factor the expression by grouping terms. : 2x³ + x² - 6x - 3
What will be an ideal response?
Solve the problem. Round to the nearest hundredth, if necessary.The monthly incomes of trainees at a local mill are normally distributed with a mean of $1000 and a standard deviation of $150. What percentage of trainees earn less than $750 a month?
A. 4.75% B. 25.14% C. 22.06% D. 1.67%
The terminal side of angle ? in standard position lies on the given line in the given quadrant. Find sin ?, cos ?, and tan ?.
quadrant III
A. sin ? = - 
;
cos ? = - 
;
tan ? = 
B. sin ? = - 
;
cos ? = - 
;
tan ? = 
C. sin ? = - 
;
cos ? = - 
;
tan ? = - 
D. sin ? = 
;
cos ? = - 
;
tan ? = - 