I believe that your answer is wrong and that it should be 19.2. If you set up a proportion of 5/12=8/x, and solve for x, that’s what you get
There are a few types of triangles
scalene- all sides different sizes
isosceles- 2 sides equal and one different and
equilateral- all sides equal.
all sides in this are equal so it is equilateral
Answer:
The trigonometrical expression is sin² A + sin A - 2 cos A - 2 cos A × sin A = 0
Step-by-step explanation:
Given Trigonometrical function as :
= 2 (1 + cosec A)
Or,
= 2 (1 + cosec A)
,<u> Now, rationalizing </u>
= 2 (1 + cosec A)
Or,
= 2 ( 1 + 
Or,
= 2 ( 
Or,
= 2 ( 
Or,
= 2 ( 
Or,
= 2 ( 
Or,
= 2 ( 
Or,
= 2 ( 
Or,
= 2 ( 
Or,
= 2 ( 
Or, sin A + sin² A = 2 cos A (1 + sin A)
Or, sin A + sin² A = 2 cos A + 2 cos A × sin A
Or, sin² A + sin A - 2 cos A - 2 cos A × sin A = 0
So,The trigonometrical expression is sin² A + sin A - 2 cos A - 2 cos A × sin A = 0 Answer
The process described here is called "Evaluating" the expression... if that's what you're looking for?