Show That the Equation Is Not an Identity by Finding $\sin 2 x + \sin 4 x = \sin 5 x$

question 20

Multiple Choice

Show that the equation is not an identity by finding a value of x for which both sides are defined but not equal.
- $\sin 2 x + \sin 4 x = \sin 5 x$

• A) \(\frac { \pi } { 2 }\)
• B) 0
• C) \(\pi\)
• D) \(2 \pi\)

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