Skip to content

sin, asin

Sine, arcsine

sin x     sin[x]
asin x    asin[x]

Where x is a numeric, returns

sin
the sine of x, taken to be in radians. The result is between -1 and 1, or null if the argument is null or infinity.
asin
the arcsine of x; that is, the value whose sine is x. The result is in radians and lies between -\frac{\pi}{2} and \frac{\pi}{2}. (The range is approximate due to rounding errors). Null is returned if the argument is not between -1 and 1.
q)sin 0.5       / sine
0.4794255
q)sin 1%0
0n

q)asin 0.8      / arcsine
0.9272952

Implicit iteration

sin and asin are atomic functions.

q)sin (.2;.3 .4)
0.1986693
0.2955202 0.3894183

q)asin (.2;.3 .4)
0.2013579
0.3046927 0.4115168

q)sin `x`y`z!3 4#til[12]%10
x| 0         0.09983342 0.1986693 0.2955202
y| 0.3894183 0.4794255  0.5646425 0.6442177
z| 0.7173561 0.7833269  0.841471  0.8912074

cos, acos
Mathematics