OpenStax, Precalculus 2e §5.4 Right Triangle Trigonometry · Exercise 6 · Trigonometry · Right triangles
Right Triangle Trigonometry · Exercise 6
Use cofunctions of complementary angles.
cos \left(\text{34}°\right) = sin \left(__°\right)
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Precalculus 2e · §5.4 Right Triangle Trigonometry · Exercise 6
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