In trigonometry, while solving a word problem related to angle of elevation or angle of depression is it necessary to always take tan? When should we use sin and cos?
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When in the question we need to find the relationship between the hypotenuse and the perpendicular( the side opposite to the given angle),use the ratio of sin.
When in the question we need to find the relationship between the hypotenuse and the base(the side adjacent to the given angle),use the ratio of cos.
When in the question we need to find the relationship between the perpendicular(the side opposite to the given angle) and the base(the side adjacent to the given angle),use the ratios of tan.
Hope it helps.
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