Trig Exact Value

Which expression is equivalent to sin(200°)?

• −sin20°

• cos 20°

• cos 70°

• −sin70°

Expressed as a function of a positive acute angle, sin230° is equal to

• −sin40°

• −sin50°

• sin40°

• sin50°

Which expression is equivalent to sin(−120°)?

• sin60°

• −sin60°

• cos 30°

• −cos 60°

Which expression is not equivalent to sin150°?

• sin30°

• −sin210°

• cos 60°

• −cos 60°

Two straight roads intersect at an angle whose measure is 125°. Which expression is equivalent to the cosine of this angle?

• cos 35°

• −cos 35°

• cos 55°

• −cos 55°

Expressed as a function of a positive acute angle, cot(−120)° is equivalent to

• −tan60°

• cot60°

• −cot30°

• cot30°

The expression tan(−240°) is equivalent to

• tan60°

• −tan30°

• −tan60°

• tan30°

In the accompanying diagram of a unit circle, the ordered pair (x,y) represents the locus of points forming the circle. Which ordered pair is equivalent to (x,y)?

• (sinθ,cos θ)

• (cotθ,tanθ)

• (tanθ,cotθ)

• (cos θ,sinθ)

If m∠θ = 120, what is the value of x in simplest form?

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What is the image of (1,0) after a counterclockwise rotation of 60°?

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