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ECE Board November 1998: Solve for A for the given equation 2 A = 1- 2 A

1. 45°, 125°, 225°, 335°
2. 45°, 125°, 225°, 315°
3. 45°, 135°, 225°, 315°
4. 45°, 150°, 220°, 315°

Answer

C. 45°, 135°, 225°, 315°

Solution

2A=1- 2A 2 2A=1 A= 1/ 2 A=45°,135°,225°,315°.

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