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What are allied angles |
| Answer» Trigonometric Ratios of Allied AnglesTwo angles are said to be allied when their sum or difference is either\xa0zero or a multiple of 90°. The angles — θ, 90° ± θ, 180° ± θ, 270° + θ,\xa0360° —θ etc., are angles allied to the angle θ, if θ is measured in degrees. | |