Concept explainers
a.
Explain: How
a.

Explanation of Solution
Given information:
Formula used:
Angle-Angle-Angle property of similarity of triangles.
Since,
So,
Since,
So,
Since,
So, By Angle-Angle-Angle property of similarity of triangles,
b.
To find: Similarities imply about ratios
b.

Answer to Problem 6PS
Similarities imply about ratios
Explanation of Solution
Given information:
Formula used:
Corresponding sides of similar triangle are proportional.
As we know, Corresponding sides of similar triangle are proportional.
As,
So,
As,
So,
By equation 1 and 2,
We get,
Similarities imply about ratios
c.
To Find: Does the value of
c.

Answer to Problem 6PS
No, the value of
Explanation of Solution
Given information:
The value of any trigonometric ratio depends on angle.
As the angle is constant in all the three triangles. So, the value of
No, the value of
d.
To Find: Does the conclusion from part(c) applies to other five trigonometric functions.
d.

Answer to Problem 6PS
Yes, the conclusion from part(c) applies to other five trigonometric functions.
Explanation of Solution
Given information:
The value of any trigonometric ratio depends on angle.
As the angle is constant in all the three triangles. So, the value of all trigonometric ratios will not change with triangle.
Yes, the conclusion from part(c) applies to other five trigonometric functions.
Chapter 4 Solutions
EBK PRECALCULUS W/LIMITS
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