Moderate -0.5 This is a straightforward trigonometric identity proof requiring only basic manipulation of sec and cosec definitions. Students need to express everything in terms of sin and cos, find a common denominator, and apply the Pythagorean identity sin²θ + cos²θ = 1. It's slightly easier than average because it's a direct proof with a clear path and no problem-solving insight required, though worth 4 marks for showing all algebraic steps.