141 Answered Questions for the topic Precalc
Prove trig identity.
cos(2x)+sin^2 x = 1/2 sin(2x) cot x.
I'm having trouble with several questions listed below:
1. Find the exact value of cos(t/2) if sin(t) = -7/25 and pi < t < 3pi/2 2. Find all the solutions in the interval [0,360] cos(2x)= - sqrt3/2
PRECALCULUS HELP: inverse of a equation
The functionf(x) = −12 x^2 + 6x + 5is not invertible, however the domain can be restricted so that the function is invertible only on the restricted domain. There are many ways to do this. One way... more
Solve the problem- precalc
A. $20000. B.$61000. C. $18000. D. $41000 A 122000 trust is to be invested in bonds paying 7%, CDs paying 5%, and mortgages paying 9%. The bonds and cds investment must equal the mortgage... more
Determine all non permissible values
Determine all the non-permissible values of f(x)= (x^2-1)/(x^2-x-6)
Look for the intersections of the functions
f(x)=2x^2-3x+1 g(x)=-x^2+2x+3 Give your answers as coordinates (a,b)
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?
An egg salesman has 5 dozen eggs that he will sell for $1.00 per dozen. Before they can be sold, they must pass an inspection.
An egg salesman has 5 dozen eggs that he will sell for $1.00 per dozen. Before they can be sold, they must pass an inspection. Three eggs are selected at random. If all three are good, the... more
Exponential Growth Problem Involving bacteria population??! PLEASE HELP!!! - Precalculus
I am really stuck on this question, particularly questions 3 and 4. Could you please show how you get the answers to those questions and explain? I have been stuck on those for a while and would... more
The count in a bateria culture was 100 after 15 minutes and 1800 after 30 minutes.? Find the population in 95 minutes? EXPONENTIAL GROWTH PROBLEM!? PLEASE HELP
The count in a bateria culture was 100 after 15 minutes and 1800 after 30 minutes. 1. What was the initial size of the culture? Round your answer to the nearest bacteria. 2. Find the doubling... more
Rectangular coordinate (-2,5) is given. Find all polar coordinates that satisfy.
Need help as fast as you can. Also need tutor
Elimante parameter. x=t+4, y=t^2
need help on this fast please
Find the work done by a force F of 36lb acting in the direction of (3,5) in moving an object from (1,2) to (6,8)
I need help with this.
Please prove that cot A + cot B + cot C = (a^2 + b^2 + c^2)/(4(area of triangle ABC)).
I need help with this proof. Please help me.
Solve, can not cross multiply, need to verify so you can only change one side.
√(6)-√(2) = √(2-√(3)) 4 2
pre calc question
The lengths of the sides of a triangular parcel of land are approximately 500 feet, 600 feet, and 950 feet. If land is valued at $2000 per acre (1 acre is 43,560 ft2), what is the value of the... more
sin x precalc
Use a graphing device to approximate, to one decimal place, the solutions to the equation. (Enter your answers as a comma-separated list.)sin x + 17x = x3
find the length of the side of the square, given its 3 inches shorter than the diagonal
The side of a square is 3 inches shorter than the length of the diagonal. Find the length of the side.
find the lengths of the triangle and the square
the sides of an equilateral triangle are one unit more than the sides of a square. If the sum of their perimeters is equal to 107 inches, then find the lengths of the sides of both the square and... more
the distance between x and -12 is at least 2
use absolute value notation to describe the situation
Precalc Side Angle Measurement
I have no idea how to find an angle when you have 2 sides of a right triangle
It is a right triangle with two unknown angles and one unknown side length. The present lengths are 8 and 11. I need to find one of the angles. Please help!
I found an answer to my problem but I don't think its simplified. Here it is:
cosine 48= 13/x .6691=13/x 1/13 ∗ .6691 = 13/x ∗ 1/13 .6691/13=x Can my answer be simplified further?!? Please help me!
9x2+4=2x Solve using the quadratic formula.
9x2+4=2x Solve using the quadratic formula PLEASE RESPOND ASAP