Engineering Board Exam Reviewer · Trigonometric Equations · medium

CE Board November 1993: If 3A = 6B, then

1. A + B = 90°
2. A + 2B = 30°
3. A + B = 180°
4. None of these

Answer

B. A + 2B = 30°

Solution

3A= 6B (90°-3A)= 6B 90°-3A=6B A+2B=30°.

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