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• Identical expressions

• - four *sin(x)*cos(x) = zero
• minus 4 multiply by sinus of (x) multiply by co sinus of e of (x) equally 0
• minus four multiply by sinus of (x) multiply by co sinus of e of (x) equally zero
• -4sin(x)cos(x) = 0
• -4sinxcosx = 0

• Similar expressions

• 4*sin(x)*cos(x) = 0
• -4*sinx*cosx = 0