It is an abbreviation for sine, and that word together with cosine and tangent are used in simple trigonometrical calculations about right-angled triangles. If we take the shortest side of the triangle, together with the hypotenuse (the longest side) these two sides enclose an angle. The sine of that angle tells us how long the third side is compared with the hypotenuse. Draw a triangle ABC with the right angle at A, the shortest side called AB, the hypotenuse called BC, and the remaining side CA, then if we wanted the sine of angle B we would divide the length of CA by the length of CB. If you want to find the Sine of 50 degrees on a calculator you would press buttons in this order: 50, then the sin button, and the answer would be given almost instantly in the calculator's window. That's much quicker than having to calculate for yourself.
2nd sin, simple
Google's calculator result for sin(7) = 0.656986599
You need a scientific calculator, or one with function keys.
You can use the inverse of sin when you want to solve an equation where x is the angle you're trying to find. Say sin(x)=32/50 Since you can't plug "x" into your calculator, use the arc sin (represented on your calculator by sin -1) on both sides to get rid of the sin. This is how it would plug into your calculator: sin-1 (32/50) Whatever the answer is would be what "x" equals.
a flower with square roots
If 1 is a radian measure, using a calculator, sin(1)=0.84147
Cos is short for Cosine ( Complementary Sine) Similrly Sin is short for Sine Tan is short for Tangent.
If sin(A) = 0.42 then A = arcsin(0.42).On calculators, the arcsin key is usually reached by using another key before the sin key, and is shown as "sin to the power -1".Make sure that your calculator is set to degrees rather than radians (to check this, try sin(90). If the answer is 1 the calculator is in degree mode; if it is 0.8940 it is in radian mode.
The "sin" button on a calculator gives the sine trigonometric ratio of the given angle.
According to my Windows calculator.... 0.75
1. Be sure that your graphing calculator is in degree mode. 2. Press sin( 3. Press 72, ) 4. Press Enter The calculator shows: .9510565163 5. Round to .95 Answer: sin 72° = .95
x = sin-1 (4/15) ( sin -1 is [SHIFT] [sin] on a calculator ) = 15.5