Trigonometric Identities

Math ⇒ Trigonometry

Trigonometric Identities starts at 10 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Trigonometric Identities. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.

See sample questions for grade 11

If cosθ = –3/5 and θ is in the third quadrant, find sinθ.

If sinA = 0.6 and cosA = 0.8, verify the Pythagorean identity for A.

If sinθ = 1/2 and θ is in the second quadrant, what is the value of cosθ?

If sinθ = 3/5 and θ is in the first quadrant, find cosθ.

If tanA = 1, what is the value of A between 0° and 90°?

If tanθ = 2 and θ is in the first quadrant, find sinθ and cosθ.

Prove that 1 – sin²θ = cos²θ.

Prove that sin(π – θ) = sinθ.

Prove that tan(–θ) = –tanθ.

State the co-function identity for sin(90° - θ).

State the even-odd property for the sine function.