A ship is moving relative to the water and you are given the following velocities: Magnitude Direction (degrees) (kn/hour) 8 Velocity Absolute water velocity (tide) Ship's velocity relative to water 120 20 90 The directions are measured clockwise from due north (i.e. due east is 90°). What is the ship's absolute velocity (magnitude and direction)?

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Ratios

A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.

Trigonometric Ratios

Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.