2,195 Answered Questions for the topic Pre Calculus

Pre Calculus Math Precalculus

05/03/19

if tan x= negative 3/14 and pi/2< x<pi , find cos2x
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Pre Calculus Math Precalculus

05/03/19

write sin 6x + sin 2x as a product of sines and/or cosines
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Pre Calculus Math Prealgebra Precalculus

05/02/19

Equations! please help
consider the equation x2-6x-40=0. Make sure to show your work for each part.a) Solve the equation by factoring and using the zero product rule b)solve the equation by completing the square and and... more
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Pre Calculus

04/27/19

Find the missing values assuming continuously compounded interest. What is the time to double?

Initial investment $1000, Annual %rate 9.2%, Time to Double?, Amount after 10 years?
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Pre Calculus

04/23/19

Find an equation for the parabola that has its vertex at the origin and satisfies the given condition. Focus F(−5, 0)
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Pre Calculus Trigonometry

03/30/19

Lowering Powers
Use the formulas for lowering powers to rewrite the expression in terms of the first power of cosine.cos4(x) sin2(x)
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Pre Calculus

03/22/19

simplifying trig functions
1/x^2√(16+x^2) x=4tan(θ)
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Pre Calculus

03/22/19

Simplifying trig functions
(5/1-sin(x))+(5/1+sin(x))
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Pre Calculus

03/17/19

Use sin(2t)=2sin(t)cos(t) to rewrite sin(6x)cos(6x).
Use sin(2t)=2sin(t)cos(t) to rewrite sin(6x)cos(6x).sin(6x)cos(6x)=A.1/2sin(3x)B. 2sin(3x)C. 2sin(12x)
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Pre Calculus

03/14/19

3 equation problem

Jovita divides 17,000 into three investments a savings account paying 6% annual interest, a bond paying 9% and a money fund paying 11%. The annual interest from the three accounts is 1540 and she... more
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Pre Calculus

03/14/19

A gardener has 440 feet of fencing to fence in a rectangular garden. One side of the garden is bordered by a river and so it does not need any fencing.
What dimensions would guarantee that the garden has the greatest possible area? shorter side:  ? ft (feet)longer side: ? ft (feet)greatest possible area:   ? ft2  (square-feet)
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Pre Calculus Logarithm

03/05/19

The function v(t)=6000(1.08)^t gives the value, V, of an investment t years after the initial investment. How many years until the value of the investment doubles?
im having a real hard time since its not compound continuously, im not sure where to start.
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Pre Calculus

03/01/19

If 9% of a radioactive substance decays in 8 hours, what is the half life of the substance?
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Pre Calculus

02/28/19

WHAT ARE THE ZEROS OF f(x)=(x+5)(x-4)(x+8)
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Pre Calculus

02/27/19

How do you use the composite argument property to show that an equation is an identity?
Use the composite properties to show that sin(θ+90) - cos(θ+180)= 2cosθ is an identity.
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Pre Calculus Algebra 2 Properties Cosine

02/27/19

How do you use the composite properties to show that an equation is an identity?
With this equation.cos(θ-180) = -cosθ
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Pre Calculus

02/27/19

How do you use the composite argument properties to transform the left side of the equation to a single function of a composite argument?
cosxcos50°-sinxsin50°=.7then solve algebraeically with the domain x∈[0°,360°]
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Pre Calculus

02/27/19

How do you find the complement angle and the cofunction of that complement of cos241 degrees?
Show that they equal each other.
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Pre Calculus

02/27/19

How do you find the complement angle and cofunction of that complement of csc79 degrees?
Also show how they equal each other.
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Pre Calculus

02/27/19

find the closed form of the sequence (9)/(5),(9)/(8),(9)/(11),(9)/(14)
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Pre Calculus Math Calculus

02/25/19

Find a polynomial function with the zeros -2 multiplicity 2 and 2 multiplicity 2. whose graph passes through the point (-3,50)
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Pre Calculus

02/25/19

What is an equation of a line parallel to y=2x+1 with an x-intercept of 7
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Pre Calculus

02/22/19

The graph of f(x)=sin(x) is transformed to a new function, g(x) , by stretching it vertically by a factor of 2 and shifting it 3 units up.
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Pre Calculus

02/19/19

Please help me solve this problem

For f(x)=x^2+8, find (f o g)(x)
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Pre Calculus

02/17/19

Write an equation ​(a) in​ slope-intercept form and ​(b) in standard form for the line passing through ​(−3,6) and parallel to x+2y=5
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