A abhinv New member Joined Jul 26, 2014 Messages 1 Jul 26, 2014 #1 Hello, I have a question, which I am unable to solve. Prove that: cox^3x - sin^3x / cosx - sinx = 1/2 (2+sin2x) Please help me with this.. Thanks...
Hello, I have a question, which I am unable to solve. Prove that: cox^3x - sin^3x / cosx - sinx = 1/2 (2+sin2x) Please help me with this.. Thanks...
D Deleted member 4993 Guest Jul 26, 2014 #2 abhinv said: Hello, I have a question, which I am unable to solve. Prove that: (cox^3x - sin^3x) / (cosx - sinx) = 1/2 (2+sin2x) Please help me with this.. Thanks... Click to expand... Those parentheses are important! Now use: a3 - b3 = (a-b)(a2 + ab + b2)
abhinv said: Hello, I have a question, which I am unable to solve. Prove that: (cox^3x - sin^3x) / (cosx - sinx) = 1/2 (2+sin2x) Please help me with this.. Thanks... Click to expand... Those parentheses are important! Now use: a3 - b3 = (a-b)(a2 + ab + b2)
