SAT · Mathematics · Trig Identities — T/F

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   sin²θ + cos²θ = 1.

2. Statement is true

   Yes

   Statement

   tan θ = sin θ / cos θ.

3. Statement is true

   No

   Statement

   sin(2θ) = 2 sin θ.

4. Statement is true

   Yes

   Statement

   sin(2θ) = 2 sin θ cos θ.

5. Statement is true

   No

   Statement

   cos(0) = 0.

6. Statement is true

   Yes

   Statement

   tan(90°) is undefined.

Instructions

Decide each trig statement.