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• Identical expressions

• (three *sin(x) + four *cos(x)) = zero
• (3 multiply by sinus of (x) plus 4 multiply by co sinus of e of (x)) equally 0
• (three multiply by sinus of (x) plus four multiply by co sinus of e of (x)) equally zero
• (3sin(x) + 4cos(x)) = 0
• 3sinx + 4cosx = 0

• Similar expressions

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