O-Level & SEC, Asia
Trigonometric Identities: Maths & Science Common Mistakes Students Make
Trigonometric identities, logarithms and calculus cause most lost marks. Here’s how to practise each.
A-Math, step by step
Additional Mathematics in Singapore secondary schools moves fast. With exams moving from the O-Level to the new SEC from 2027, the core skills stay the same.
Trigonometric identities
Keep a single sheet of identities and prove each one yourself at least once. You’ll recognise them faster under pressure.
When stuck on a proof, rewrite everything in sin and cos. It works more often than not.Margin note from Daniel
Free download: JEE physics formula sheetUse it alongside this article. We’ll email it to you.
Calculus applications
Rates of change and stationary points appear every year. Practise reading the question carefully to see what is being asked.
Stuck on this? Daniel Otieno can help.One-to-one lessons in Mathematics, Statistics. First lesson free with most tutors.
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