In a right triangle, the sine of the angle is equal to the
(leg opposite the angle) divided by the (hypotenuse).
It's well known that the hypotenuse is always the longest side in the right triangle,
so this division can never come out to be more than ' 1 '.
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If you look at the definition of the sine function in a triangle, you'll discover that the maximum possible value of the sine function is ' 1 ' and the minimum possible value is ' -1 '. There's no angle that can have a sine greater than ' 1 ' or less than ' -1 '. So the absolute value of the sine of anything is always ' 1 ' or less.
No angle has a sine function greater than 1.
1 it can not used when the angle more than 45 degrees.....
The sine and the cosine are always less than one.
Sine = Opposite divided by Hypotenuse Opposite is the side of the triangle opposite the angle (in this case the 90o angle). Hypotenuse is the side opposite the right angle in a right angle triangle. Therefore, Sine 90 = 1 because the opposite side and the hypotenuse are the same side, they are both opposite the right angle.