Trigonometric Identity

A trigonometric identity is an equation involving trigonometric ratios that is true for every value of the angle, unlike an equation solved for particular angles. The basic identity is $\sin^{2}\theta+\cos^{2}\theta=1$.

Identities are used to simplify expressions and to prove other relationships.

You meet Trigonometric Identity in the Trigonometric Functions chapter of SPM Additional Mathematics. Knowing the term precisely matters in the exam: questions often hinge on reading a keyword correctly, and because SPM marking is analytic, using the right definition in your working helps secure method marks.

Our teachers make sure a student can not only recite what Trigonometric Identity means but use it fluently in a full solution.

Because the SPM Add Math paper is bilingual (BM/EN), it helps to know this term in each language: Trigonometric Identity (EN) · Identiti Trigonometri (BM) · 三角恒等式 (中文)

Other key terms from the Trigonometric Functions chapter you may want to check:

• Reciprocal Trigonometric Ratios
• Reference Angle
• Amplitude
• Period
• Addition Formula
• Double Angle Formula