Solution: Solve for A for the given equation cos^2 A = 1 – cos^2 A.

Solve for A for the given equation cos^2 A = 1 – cos^2 A. How to evaluate trigonometric equation?

Solve for A for the given equation cos^2 A = 1 – cos^2 A.

Problem Statement: ECE Board November 1998

Solve for A for the given equation cos^2 A = 1 – cos^2 A.
  • A. 45, 125, 225, 335 degrees
  • B. 45, 125, 225, 315 degrees
  • C. 45, 135, 225, 315 degrees
  • D. 45, 150, 220, 315 degrees

Problem Answer:

The equivalent value of A is 45, 135, 225, 315 degrees

Solution:

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