Solution Found!
In Exercises 1151, prove the identity.1x sin a + y cos a22
Chapter 5, Problem 5.1.1.149(choose chapter or problem)
QUESTION:
In Exercises 11–51, prove the identity.
\((x \sin \alpha+y \cos \alpha)^{2}+(x \cos \alpha-y \sin \alpha)^{2}=x^{2}+y^{2}\)
Questions & Answers
QUESTION:
In Exercises 11–51, prove the identity.
\((x \sin \alpha+y \cos \alpha)^{2}+(x \cos \alpha-y \sin \alpha)^{2}=x^{2}+y^{2}\)
ANSWER:Step 1 of 2
We start with the LHS
First we recognize expression for the square of sum
and the square of difference
We implement that in the task
