- 6-7.1: Studio Problem: A contractor plans to build an artists studio with ...
- 6-7.2: Detour Problem: Suppose that you are the pilot of an airliner. You ...
- 6-7.3: Pumpkin Sale Problem: Scorpion Gulch Shelter is having a pumpkin sa...
- 6-7.4: Underwater Research Lab Problem: A ship is sailing on a path that w...
- 6-7.5: Truss Problem: A builder has specifications for a triangular truss ...
- 6-7.6: Mountain Height Problem: A surveying crew has the job of measuring ...
- 6-7.7: Rocket Problem: An observer 2 km from the launching pad observes a ...
- 6-7.8: Grand Piano 2: The lid on a grand piano is held open by a 28-in. pr...
- 6-7.9: Airplane Velocity Problem: A plane is flying through the air at a s...
- 6-7.10: Canal Barge Problem: In the past, it was common to pull a barge wit...
- 6-7.11: Airplane Lift Problem: When an airplane is in flight, the air press...
- 6-7.12: Ships Velocity Problem: A ship is sailing through the water in the ...
- 6-7.13: Wind Velocity Problem: A navigator on an airplane knows that the pl...
- 6-7.14: Space Station 1: Ivan is in a space station orbiting Earth. He has ...
- 6-7.15: Visibility Problem: Suppose that you are aboard a plane destined fo...
- 6-7.16: Hinged Rulers Problem: Figure 6-7k shows a meterstick (100-cm ruler...
- 6-7.17: Surveying 2: A surveyor measures the three sides of a triangular fi...
- 6-7.18: Surveying 3: A field has the shape of a quadrilateral that is not a...
- 6-7.19: Surveying 4: Surveyors find the area of an irregularly shaped tract...
Solutions for Chapter 6-7: Real-World Triangle Problems
Full solutions for Precalculus with Trigonometry: Concepts and Applications | 1st Edition
Annual percentage rate (APR)
The annual interest rate
In statistics, a nonnumerical variable such as gender or hair color. Numerical variables like zip codes, in which the numbers have no quantitative significance, are also considered to be categorical.
A relationship between two variables in which the values of the response variable are directly affected by the values of the explanatory variable
Combinations of n objects taken r at a time
There are nCr = n! r!1n - r2! such combinations,
Interest compounded using the formula A = Pert
See Cartesian coordinate system.
An identity involving a trigonometric function of u - v
Difference of complex numbers
(a + bi) - (c + di) = (a - c) + (b - d)i
Inverse cotangent function
The function y = cot-1 x
Logistic growth function
A model of population growth: ƒ1x2 = c 1 + a # bx or ƒ1x2 = c1 + ae-kx, where a, b, c, and k are positive with b < 1. c is the limit to growth
Measure of center
A measure of the typical, middle, or average value for a data set
Measure of spread
A measure that tells how widely distributed data are.
Midpoint (in a coordinate plane)
For the line segment with endpoints (a,b) and (c,d), (aa + c2 ,b + d2)
Midpoint (on a number line)
For the line segment with endpoints a and b, a + b2
NINT (ƒ(x), x, a, b)
A calculator approximation to ?ab ƒ(x)dx
See Complex plane.
A transformation that leaves the basic shape of a graph unchanged.
Root of an equation
Row echelon form
A matrix in which rows consisting of all 0’s occur only at the bottom of the matrix, the first nonzero entry in any row with nonzero entries is 1, and the leading 1’s move to the right as we move down the rows.
Vertices of an ellipse
The points where the ellipse intersects its focal axis.