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• Identical expressions

• -cos(x/ three - five)/ nine = zero
• minus co sinus of e of (x divide by 3 minus 5) divide by 9 equally 0
• minus co sinus of e of (x divide by three minus five) divide by nine equally zero
• -cosx/3 - 5/9 = 0
• -cos(x divide by 3 - 5) divide by 9 = 0

• Similar expressions

• cos(x/3 - 5)/9 = 0
• -cos(x/3 + 5)/9 = 0