2,208 Answered Questions for the topic Pre Calculus

Pre Calculus Trigonometry

07/13/16

sin(4x)-sin(6x)=0
Solve for 0<x<2pi  
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Pre Calculus

06/27/16

HELP ME PLEASE
Absolute values inequalities are like compound inequalties. A compound inequaltity cosists of 2 inequalities possibly separated by a word. A conjunction compound inequaltiy uses the word AND while... more
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06/20/16

if the radius of the circle in the figure is 20 cm and length equals 85 cm, what is the radian measure of angle
If the radius of the circle in the figure is 20 cm and length equals 85 cm, what is the radian measure of angle?
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Pre Calculus Trigonometry Angles Boat

06/14/16

Trigonometry
from the top of a building a person spots two boats out on the lake. the angle of depression from the person to one of the boats is 48 degrees, the angle of depression from the person to the other... more
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06/12/16

pre cal question
Write the equation of a line through the given points in standard form Ax+By=C. (-6,1) and (-1,4)
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Pre Calculus

06/07/16

solve for k: (1/3)(e^3/2x) +(4/9k)(e^3/2k)=0
1/3e e=2.718281828  
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Pre Calculus

06/06/16

Solving word problem given angles of elevation and finding heivht
The First State Bank and a hospital are 40 meters apart. From a window in the bank, the angle of elevation to the top of the hospital is 77 degrees. From the same window the angle of depression to... more
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Pre Calculus

06/06/16

Solving word problems involving angles of elevation, angles and two ladders
a ladder 15.3 meters long can be placed so that it will reach a window on abuilding on one side of the street. at this point it forms a 55 degree with the horizontal. if the ladder is tipped the... more
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06/06/16

Need help with these logarithms questions! Thanks
1. Write as a single log 2logx - log11y + 1/2 log 11z   2. Evaluate 3log74 -2log78   3. Expand logw(12a3/b2)   thank you soo much!!
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Pre Calculus Math Help

06/01/16

Hey need help with one question that I have been stuck on ! Answer ASAP please
Identify the following characteristics of the graph of each function   i) y-intercept  ii) x -intercept  iii) make a chart that represents the function   1) y = -3log2(x+1)-6   thanks so... more
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Pre Calculus

05/30/16

what is the sum of the integers from 19 to 45
What is the sum of the integers from 19 to 45 and how do you find it on a Ti-84 Graphing calculator if possible?
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Pre Calculus

05/27/16

i need help
 One side of a farmer's field is bordered by a straight stretch of highway. The opposite side is bordered by a river whose path traces a curve that is modeled by the function f(x)= 16 - x2 . The... more
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05/26/16

Pre Calculus
Which of the answer choices has matrix multiplication defined?A B C D⌈1 2⌉ ⌈5 6 7⌉ ⌈-1 2 3⌉ [5 9 7] ⌊3 4⌋ ⌊8 9 0⌋ l8 -4 0l ..................⌊6 7 1⌋ a) ACb) BAc) ABd) CD
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05/26/16

Pre Calculus
Determine the quadrant when the terminal side of the angle lies according to the following conditions: sin (t) < 0, csc (t) > 0.a) Quadrant Ib) Quadrant IVc) Quadrant IId) Quadrant III
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05/26/16

Pre Calculus
Find a unit vector in the same direction as the given vector: v = 3i + 4 j.a) u=3/25i+4/25j b) u=3/√7i+4/√7jc) Vector v = 3i + 4 j is a unit vector. d) u=3/5i+4/5j
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05/26/16

Pre Calculus
Find the projection of vector u onto vector v; projvu= ((u•v)/llvll2)vu = i – 5j and v = i + 5j a) -12/13i-60/13j b) 1/13i+5/13j c) 12/13i+60/13j d) -1/13-60/13j
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05/26/16

Pre Calculus
Use DeMoivre’s Theorem to find the power of the complex number and write your solution in the form, a + bi.a) −4 − 4i b) -4√2-4√2ic) −8 − 8i d) -2√2-2√2i
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05/26/16

Pre Calculus
Rewrite the given parametric equations in Cartesian form: x(t)=4-t   y(t)=3t+2 a) y=14-3x b) y=3x+2 c) y=x+4 d) y=4-x
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05/21/16

Pre Calculus
Find the exact value of the expression tan(7pi/12) a) 2(1+√3)-2 b) 2(1-√3)-2 c) -2(1+√3)-2 d) -2(1-√3)-2
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05/21/16

Pre Calculus
Use the given triangle to evaluate the trigonometric expression. The graph is a right triangle, the side on the y-axis =5 and the side o the x-axis =12. The hypotenuse is not given. sin(y/2)=? a)... more
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05/21/16

Pre Calculus
Find the value for cos(x/2) if the following conditions hold: sin(x)=-12/13  and x is in quadrant 3 a) -√17/6 b) -√7/24 c) -√7/6 d) -√17/24
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05/21/16

Pre Calculus
Simplify the expression  tan(1/2 x)+tan(1/8 x)  1-tan(1/2 x)tan(1/8 x) a) tan(-5x/8) b) tan(5x/8 c) tan(-3x/8) d) tan(3x/8)
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05/19/16

Use basic trigonometric identities to simplify the expression: 3sin^3 (x) csc(x) + cos^2 (x) + 2cos (-x) cos (x) = ?
Use basic trigonometric identities to simplify the expression: 3sin3 (x) csc(x) + cos2 (x) + 2cos (−x) cos (x) = ?a) 3b) sin2 (x)c) tan2 (x) + 1d) cos2 (x)
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05/19/16

-2i=5j+(3i+4j+(-(1/3)i+(5/2)j)
-2i=5j+(3i+4j+(-(1/3)i+(5/2)j) a) (14/3)i+(3/2)j b) (16/3)i+(13/2)j c) (2/3)i+(23/2)j d) (8/3)i+(13/2)j
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05/19/16

Find an equation for the parabola described by its vertex, directrix, and focus point:
Find an equation for the parabola described by its vertex, directrix, and focus point: vertex (√2, -√3), directrix x=2√2, focus (0, -√3)
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