Cosine and sine function, root of equation, surds.

[STEP I 2015 Question 2 (Pure)]

Identities, general solution, rational numbers.

[STEP II 2011 Question 4 (Pure)]

Differentiation, identity.

[STEP I 2011 Question 3 (Pure)]

Sum to product formulae, sine, cosine, coordinate geometry, parallel lines.

[STEP I 2010 Question 3 (Pure)]

Identity proof, tan, surds.

[STEP II 2009 Question 3 (Pure)]

Period of function.

[STEP II 2008 Question 6 (Pure)]

tan, identities, quartic equations.

[STEP III 2007 Question 1 (Pure)]

Identity manipulation, solution to equations.

[STEP II 2007 Question 4 (Pure)]

Identity, arctan, highest common factor, hcf.

[STEP I 2007 Question 2 (Pure)]

Tan identity, proof, simultaneous equations.

[STEP II 2005 Question 4 (Pure)]