Trigonometry
Angle Sum and Difference, Double Angle and Half Angle Formulas
Find the exact value of:
Sin 85* cos 20* - Cos 85* sin 20*

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)

Using inductive reasoning, what are the next two number in this set? 2,3/2,4/3,5/4,

Is there a direction u in which the rate of change of f(x, y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.