SOLUTION: Which expression is equivalent to sin(0.6x)-sin(0.4x)?
a. 2cos(0.5x)sin(0.1x)
b. 2cos(0.5x)cos(0.1x)
c. 2sin(0.5x)sin(0.1x)
d.-2sin(0.5x)sin(0.1x)
e.-2cos(0.5x)sin(0.1x)
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Question 1170381: Which expression is equivalent to sin(0.6x)-sin(0.4x)?
a. 2cos(0.5x)sin(0.1x)
b. 2cos(0.5x)cos(0.1x)
c. 2sin(0.5x)sin(0.1x)
d.-2sin(0.5x)sin(0.1x)
e.-2cos(0.5x)sin(0.1x)
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
let
then we have
use the following identity : where and
............since
so, answer is
a.
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