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The earth, which we live on, is approximately a sphere. It is important, therefore, to know spherical trigonometry.
The students and teacher of my trig. class
Trigonometry is important in daily life for many reasons. People use patterns and symmetry in relating to objects around them. For example. trigonometry is used in decorating a home.
According to Math experts, Hipparchus, Menelaus, and Ptolemy are responsible for developing Greek trigonometry for the purposes of studying differences in shapes of the planets, sun and moon. By observing the shapes of each, they were able to determine the ratios and areas of each one.