Let (in radians) be an acute angle in a right triangle and let and y, respectively, be the lengths of the sides adjacent to and opposite 0. Suppose also that a and y vary with time. At a certain instant x = 9 units and is increasing at 1 unit/s, while y = 8 and is decreasing at How fast is changing at that instant? Answer: units/s.

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter12: Quadratic Functions
Section12.8: Joint And Combined Variation
Problem 7P
Question
Let (in radians) be an acute angle in a right triangle and let and y, respectively, be the lengths of the sides
adjacent to and opposite . Suppose also that a and y vary with time.
At a certain instant x = 9 units and is increasing at 1 unit/s, while y = 8 and is decreasing at units/s.
How fast is changing at that instant?
Answer:
Transcribed Image Text:Let (in radians) be an acute angle in a right triangle and let and y, respectively, be the lengths of the sides adjacent to and opposite . Suppose also that a and y vary with time. At a certain instant x = 9 units and is increasing at 1 unit/s, while y = 8 and is decreasing at units/s. How fast is changing at that instant? Answer:
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