1. The rule for divisibility by 9 is similar to divisibility rule for 3. That is, if the sum of digits of the number is divisible by 9, then the number itself is divisible by 9. For example, with 2871, you just add \(2 + 8 + 7 + 1 = 18\). Since \(18\) is …
Conversion from Cartesian coordinates \((x, y)\) to Polar coordinates \((r, \theta)\) is a fundamental concept in mathematics. What are the two systems? Cartesian System → A point is represented as \((x, y)\) Polar System → A point is represented as \((r, \theta)\) Where: \(r\) = distance from origin \(\theta\) = angle with the positive \(x\)-axis …
Electrical Engineering GATE EE Solved Question Paper 2026