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    Mathematics
  3. Study Set
    Algebra and Trigonometry Study Set 1
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    Exam 6: Analytic Trigonometry
  5. Question
    Verify the Identity\[\cos 4 \theta = 2 \cos ^ { 2 } ( 2 \theta ) - 1\]
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Verify the Identity cos⁡4θ=2cos⁡2(2θ)−1\cos 4 \theta = 2 \cos ^ { 2 } ( 2 \theta ) - 1cos4θ=2cos2(2θ)−1

Question 42

Question 42

Essay

Verify the identity.
- cos⁡4θ=2cos⁡2(2θ)−1\cos 4 \theta = 2 \cos ^ { 2 } ( 2 \theta ) - 1cos4θ=2cos2(2θ)−1

Correct Answer:

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