![]() Relation between supplementary angle ratios The tangent between these two angles is also related, although it cannot be seen graphically:ģ0º and 60º are complementary angles since 90-60=30, therefore: The sine lengths of α and the cosine of 90º-α are also equal: Note that 90º-α is equal to another angle α, but measured from the y-axis: When two angles add up to 90º, the cosine lengths of α and the sine length of 90º-α are equal. Relation between complementary angle ratios The supplementary angles are those whose sum is equal to 180º.Ĥ5º and 135º are seplementary angles since their sum is equal to 180º. ![]() The complementary angles are those whose sum is equal to 90º.Ĥ0º and 50º are complementary angles since their sum is equal to 90º. 7.2 We can calculate trigonometric ratios of related anglesīefore you begin to analyze the relationships between the ratios of related angles, you should know two concepts: complementary angles and supplementary angles.7.1 The calculator only gives you an angle of the possible.7 Applications of ratio ratios between different angles.6 Relation between angle ratios differing by 90º.5 Relation between ratios of opposite angles.4 Relation between ratios of angles that differ by 180º.3 Relation between supplementary angle ratios.2 Relation between complementary angle ratios.1 Supplementary and supplementary angles.
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