Engineering Board Exam Reviewer · Trigonometric Identities · medium

ECE Board November 1996: If A = 2.511x, A = 3.06x and 2A = 3.939x, find the value of x.

1. 0.265
2. 0.256
3. 0.562
4. 0.625

Answer

B. 0.256

Solution

2A=2 A A 3.939x=2(2.511x)(3.06x)=15.367x2 x=3.939/15.367 0.256.

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