Trigonometric Ratio: Secant
How to solve secant (trigonometric ratio) problems: definition, example, and its solution.
Secant is the reciprocal of cosine.
[cos A = (Adjacent side) / (Hypotenuse)]
So sec A = (Hypotenuse) / (Adjacent side).
sec A = (hypotenuse) / (adjacent side)
In the given right triangle,
the hypotenuse is missing.
So find the hypotenuse
by using the Pythagorean theorem.
(hypotenuse) = √5
sec A = 1 / cos A
So cos A = 1/√5.
So, its reciprocal, secant is
sec A = √5/1.