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Home > PC > Chapter 4 > Lesson 4.1.1 > Problem 4-8

4-8.

Rewrite the given equation in its various forms.
Substitute the appropriate expressions in the problems below.

s2 = 1 − c2
c2 = 1 − s2

This is the same as: s2 + c2

This cannot be further simplified.

Factor out a 4 first. Then substitute an expression for s2.