In astronomy, the distance between planetary bodies is calculated using trigonometry and in navigation and geography, it helps us estimate the distance to be traveled to reach the shore, or find the height of a mountain. Trigonometry is study of the relationships among angles and sides of triangles, especially right triangles. A right triangle contains one right (90 ) angle. Trigonometry is a branch of math which deals exclusively with triangles and the relation between their sides and angles. This discipline can be traced back to ancient.
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