#006 Trig Identities

When writing trigonometric functions with exponents, what is the correct notation for "sine squared theta"?

• sin²(θ)

• (sinθ)²

• sin²θ

• All choices are correct.

 Which of the following is NOT one of the three Pythagorean identities mentioned?

• sin²θ + cos²θ = 1

• tan²θ + 1 = sec²θ

• 1 + cot²θ = csc²θ

• sin²θ + tan²θ = sec²θ

Which of the following is true about complementary angles in the unit circle?

• They always sum to 180°

• Their sine values are always equal

• The sine of one is equal to the cosine of the other

• They are always in different quadrants

Drag and drop the correct express to complete the trig identity.

a

b

c

d

-1

1

0