Use inverse trigonometric functions to find angles in right triangles | Trigonometry Math | Free K12 Practice

TRIG.112 Use inverse trigonometric functions to find angles in right triangles

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Skill Level🔴 Hard

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In right triangle MNO, angle M is acute. A brace is 42 cm long (hypotenuse) and its horizontal span is 31 cm (adjacent to θ). What is the angle (to the nearest tenth)?