गणितीय प्रतीकों का उपयोग करके 'HAPPY' लिखें
पहला तरीका: 

H = ∑i=1^4 cos(iπ/5) 
A = √(5 + √5) / 2 
P = ∑i=1^5 sin(iπ/6) 
P = ∑i=1^5 sin(iπ/6) 
Y = (cos(π/10) - cos(3π/10)) / sin(π/5) 

Hence, HAPPY = H + A + P + P + Y 
                = ∑i=1^4 cos(iπ/5) + √(5 + √5) / 2 + ∑i=1^5 sin(iπ/6) + ∑i=1^5 sin(iπ/6) + (cos(π/10) - cos(3π/10)) / sin(π/5) 


दूसरा तरीका: 

H = 8 
A = 1 
P = 16 
P = 16 
Y = 25 

Hence, HAPPY = H + A + P + P + Y 
                = 8 + 1 + 16 + 16 + 25 
                = 66