495 Answered Questions for the topic Precalculus Homework
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
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)...
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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)
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)
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
Rewrite the complex number in polar form
Rewrite the complex number in polar form, z=r(cos(θ)+i sin(θ))
a) cos(pi/2)+i sin(pi/2)
b) cos(pi/4)+i sin(pi/4)
c) cos(pi/6)+i sin(pi/6)
d) cos(pi/3)+i sin(pi/3)
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)
05/19/16
Rewrite the given parametric equations in Cartesian form
Rewrite the given parametric equations in Cartesian form: x(t)=2t-1 and y(t)=5t
a) y=5x+5
b) y=(5/2)x+5/2
c) y=(5/2)x+1
d) y=5x+1
05/19/16
cos(2?)=1/v2 and 180 degrees<?<270 degrees
Find the value for cos(θ) if the following conditions hold: cos(2θ)=1/√2 and 180o<θ<270o
a) -(√1+(√2))
b) -(√2+(√2))/4
c) -(√2(√2))/2
d) -(√2(√2))
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05/19/16
Find 4B (matrix)
Find 4B.
⌈2 -4⌉ = B
⌊5 -1⌋
⌈-8 -16⌉=a
⌊-20 -4⌋
⌈8 -16⌉=b
⌊20 -4⌋
⌈2 -4⌉=c
⌊20 -4⌋
⌈8 -16⌉=d
⌊5 -1 ⌋
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05/19/16
Write v in the form v = ai + bj
If vector v has an initial point at P1 and a terminal point at P2, write v as multiples of the basis vectors i=〈1, 0〉j=〈0, 1〉 That is, write v in the form v = ai + bj.P1 = (0, −2), P2 = (0, 45) and...
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05/19/16
Determine the angle measure between vectors u and v: u = – 3i + 5j and v = 6i + 2j
Determine the angle measure between vectors u and v: u = – 3i + 5j and v = 6i + 2j .a) 0°, the vectors are parallel.b) 90°, the vectors are perpendicular to each other.c) 97.8°d) 102.5°
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05/19/16
(5/3)^6x+2=(9/25)^-x+2
Given the exponential equation:(5/3)6x+2=(9/25)-x+2, find a common base and solve for x.a) -2/3b) -3/2c) 3/2d) 2/3
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05/17/16
Pre Calculus
Given the exponential equation:(5/3)6x+2=(9/25)-x+2, find a common base and solve for x.a) -2/3
b) -3/2
c) 3/2
d) 2/3
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05/17/16
Pre Calculus
How many winning lottery numbers are possible of a pick 5 where you must match all five numbers from 52 balls? a) 2,598,960b) 6.7 × 1065c) 311,875,200d) 120
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05/17/16
Pre Calculus
Solve the equation in the real number system: 9x3+9x2-4x-4=0
a)-3, 0, 3
b)-2/3, 2/3, 1
c)-1, -2/3, 2/3
d)-5, 1, 5
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05/16/16
Pre Calculus
For the rational function f(x)=(x2-1)/(x3+9x2+14x), find the domain.
a) (-∞, -7)∪(-7, -2)∪(-2, ∞)
b) (-∞, -7)∪(-7, -2)∪(-2, 0)∪(0, ∞)
c) (-∞, 0)∪(0, ∞)
d) (-∞, 0)∪(0, 2)∪(2, 7)∪(7, ∞)
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05/16/16
Pre Calculus
Given the equation of an ellipse, identify the center point: 4x2 + 40x + 25y2 - 100y + 100 = 0
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05/16/16
Pre Calculus
Given the vectors, a = 3i + 4j, b = -2i + 5j, c = 10i -j, find a + (b - c) = ?
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Precalculus Homework
04/27/16
A woman owns 21 pets. Each of her pets is either a bird or a dog. If her pets have a total of 76 legs, how many birds and how many dogs does she have?
This is probably a fairly easy problem. Please help!
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Precalculus Homework
04/24/16
Precalc Homework Question help!
Find all solutions in [0,2pi) :
sin(2t)-sin(t)=0
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Precalculus Homework
04/24/16
Precalc Math HW help please!
Consider the equation cos(3.10t)=.3. Find the smallest positive solutions in radians and round your answer to 4 decimals.
Precalculus Homework
04/24/16
Question in Description due to length
a cable that is 21 feet long goes from the ground to the top of a building and forms an angle of 40.5 degrees, with the wall of the building. How many feet tall is the building?
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Precalculus Homework Calculus
04/14/16
How many different sums of money can you make with a penny, a dime, a one-dollar coin, and a two-dollar coin?
I'm having trouble with this question
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