Trigonometry · Classes 9, 10, 11
Pythagorean Identity
Fundamental identity for all real angles.
FORMULA
\(\sin^2\theta+\cos^2\theta=1\)
Worked example
sin 30°=1/2, cos 30°=√3/2 ⇒ 1
Understand this formula
Fundamental identity for all real angles.
Check measurement units, mathematical domains and rounding before applying any result in an examination.