Question

why trigonometrical ratios are defined only in right angled triangle​

Answer 1

Answer:

yes

Step-by-step explanation:

because in right angle triangle there will be 90 degrees

Answer 2

Answer:

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Beief History:

The 3rd-century astronomers first noted that the lengths of the sides of a right-angle triangle and the angles between those sides have fixed relationships.

☛ Why only Right angled Triangles ?

Trigonometry is most simply associated with planar right-angle triangles (each of which is a two-dimensional triangle with one angle equal to 90 degrees). The applicability to non-right-angle triangles exists, but, since any non-right-angle triangle (on a flat plane) can be bisected to create two right-angle triangles, most problems can be reduced to calculations on right-angle triangles.

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