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grade 12 · PRE-004

Use a trigonometric identity

Use sine squared plus cosine squared equals one and select the sign from the quadrant.

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Show what I knowFresh problem · seed 290923666

If \(\sin\theta=-4/5\) and \(\theta\) is in quadrant IV, what is \(\cos\theta\)?

Quadrant IV

Choose an answer\(\frac{3}{5}\)\(\frac{-3}{5}\)\(\frac{-4}{5}\)\(\frac{5}{3}\)

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Math Lab is a working name for Ready Rung's separate math-learning product. Guided success and independent evidence are reported separately.