Cosine function is correctly describe by [tex]\frac{adj}{hyp}[/tex] in a right angle triangle.
What is trigonometric ratio?
" Trigonometry ratio is defined as the ratio which represents the relation between the sides of the right angle triangle with it acute angle."
According to the question,
In a right angle triangle ,
Longest side = hypotenuse
Side 1 along the acute angle [tex]\theta=[/tex]Adjacent side
Side 2 opposite to acute angle [tex]\theta=[/tex] Opposite side
Trigonometric ratio defined as
C. [tex]sin\theta =\frac{opposite side }{Hypotenuse}[/tex]
Option C is incorrect.
B. [tex]tan\theta =\frac{opposite side }{adjacent side}[/tex]
Option B is incorrect.
A. [tex]cos\theta =\frac{adjacent side }{Hypotenuse}[/tex]
Hence, Option (A) is correct answer.
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