Use half-angle identities to find the exact value of the expression.sin (-112.5°)
A. - 
B. 
C. 
D. - 
Answer: A
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Provide an appropriate response.On a multiple choice test, each question has 3 possible answers. Prove by induction that the number of different ways of completing a test with n questions is 3n.
What will be an ideal response?
Solve the problem.The orbit of a planet around a sun is an ellipse with the sun at one focus. The aphelion of a planet is its greatest distance from the sun, its perihelion is its shortest distance, and its mean distance is the length of the semimajor axis of the elliptical orbit. If a planet has a perihelion of 330.6 million miles and a mean distance of 333 million miles, write an equation for the orbit of the planet around the sun.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
If 
and 
find 
when x = 4.
What will be an ideal response?
Find the probability.A basketball player hits her shot 46% of the time. If she takes four shots during a game, what is the probability that she misses the first shot and hits the last three? Express the answer as a percentage, and round to the nearest tenth (if necessary).
A. 44.8% B. 5.3% C. 52.6% D. 4.5%