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The terminal side of θ passes through the point (−9,10). What is the exact value of sinθ in simplified form?

Sagot :

sin(θ) is equal to the ratio of the y-coordinate to the distance between the point (-9, 10) and the origin.

The distance is

√((-9)² + 10²) = √(81 + 100) = √181

and so

sin(θ) = 10/√181