Sum, quadratic equation, cosine function.

[STEP II 1991 Question 4 (Pure)]

Cubic equation.

[STEP I 1991 Question 1 (Pure)]

Sum of trigonometric functions, cosine, binomial coefficient.

[STEP III 1990 Question 4 (Pure)]

Sine function, circle, geometry.

[STEP II 1990 Question 2 (Pure)]

Differentiation, sine and cosine function, approximation.

[STEP III 1988 Question 6 (Pure)]

Complex numbers, de Moivre's theorem, imaginary part, tan, product.

[STEP II 1988 Question 5 (Pure)]

Sine function, angles, identity, quartic, quadratic.

[STEP II 1987 Question 2 (Pure)]

Sum, finite sine series, tangent.

[STEP I 1987 Question 7 (Pure)]

Curve sketching, non-zero solutions, small approximations, sine function, interval.

[STEP III Specimen Question 5 (Pure)]