sin x minus sin 3x upon sin square x minus cos square x
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Answer:
sinx tan2x
Step-by-step explanation:
sinx - sin3x /(sin²-cos²x)
2*sin(x-3x)*sin(x+3x)2/ (sin²-cos²x)
=2sin(-x)sin2x / -cos2x
=-sinx sin2x/-cos2x
= sinx tan2x
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