Sine Pari is Latin for "without equal".
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sine 40° = 0.642788
The sine of 75 degrees is about 0.9659
Sine and sign Sine is the mathemtical cyclic wave. The name is shortened to 'Sin'. Sign is to write one's name to a document.
The negative sine graph and the positive sine graph have opposite signs: when one is negative, the other is positive - by exactly the same amount. The sine function is said to be an odd function. The two graphs for cosine are the same. The cosine function is said to be even.
To find the sine ratio of a right-angled triangle divide the opposite by the hypotenuse. For example: 4/5 = 0.8 units and sine-1(0.8) = 53.13010235 degrees.