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4-72.
Use the Fundamental Pythagorean Identity to simplify each trig expression. Homework Help ✎
cos2 θ + sin2 θ
1 − cos2 θ
1 − cos2 5
1 − sin2 β
1 − sin2 (3δ)
4 − 4 sin2 (3δ)
cos2(3δ)
Factor out a 4 first.