Engineering Board Exam Reviewer · Trigonometric Identities · medium

ECE Board April 1999: ( A)4 - ( A)4 is equal to .

1. 4A
2. 2A
3. 2A
4. 4A

Answer

B. 2A

Solution

4 A - 4 A = ( 2 A- 2 A)( 2 A+ 2 A) = ( 2 A- 2 A)(1) = 2A.

More Trigonometric Identities questions

1. ECE Board April 1999: Of what quadrant is A, if A is positive and A is negative?
2. ME Board October 1996: Angles are measured from the positive horizontal axis, and the positive direction is counterclockwise. What are the…
3. ECE Board November 1998: 520° is equal to
4. CE Board November 1993: If 65° + 55° = , find in radians.
5. EE Board October 1991: The sine of a certain angle is 0.6, calculate the cotangent of the angle.
6. CE Board November 1992: If x = 1/2, y = 1/3, what is the value of (x+y)?
7. CE Board November 1993: Find the value of y in the given: y = (1+ 2 ) .
8. CE Board May 1992: Find the value of + / .
9. ME Board April 1996: Simplify the equation 2 (1+ 2 )
10. ME Board October 1995: Simplify the expression - ( ) 2

All Trigonometric Identities questions