Question

What is sin A?

Answer 1

is that even a math question cause i never heard of it

Answer 2

A right-angled triangle is a triangle in which one of the angles is a right-angle. The hypotenuse of a right angled triangle is the longest side, which is the one opposite the right angle. The adjacent side is the side which is between the angle in question and the right angle. The opposite side is opposite the angle in question.

In any right angled triangle, for any angle:

The sine of the angle = the length of the opposite side
the length of the hypotenuse

The cosine of the angle = the length of the adjacent side
the length of the hypotenuse

The tangent of the angle = the length of the opposite side
the length of the adjacent side

So in shorthand notation:
sin = o/h cos = a/h tan = o/a
Often remembered by: soh cah toa

Answer 3

oh now that i see the attachment it makes more sense

Answer 4

if you have a right angle triangle


then sinA=o/h