DIM Bakalavr Group I Practice Questions - DIM Bakalavr Group I Technical & Engineering Entrance Examination (Azerbaijan) Exam

What is the exact simplified value of sin^4(x) - cos^4(x) in terms of cos(2x)?

-cos(2x) cos(2x) -sin(2x) sin(2x)

Correct Answer:

-cos(2x)

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