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• Identical expressions

• -sqrt(two)*cos(x) = zero
• minus square root of (2) multiply by co sinus of e of (x) equally 0
• minus square root of (two) multiply by co sinus of e of (x) equally zero
• -√(2)*cos(x) = 0
• -sqrt(2)cos(x) = 0
• -sqrt2cosx = 0

• Similar expressions

• sqrt(2)*cos(x) = 0
• -sqrt(2)*cosx = 0