SOLUTION: 1) [(sin3x)/(sinx)] - [(cos3x)/ (cosx)]= 2

Question 442985: 1) [(sin3x)/(sinx)] - [(cos3x)/ (cosx)]= 2
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
To prove this, we manipulate the left-hand side (LHS) of the given equation to reach the right-hand side. That is:
=

= .

= by applying difference of two angles identity for sine function

= by simplification

= by double-angle identity for sine function

= by factoring

=
=

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