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improve comments for versed sine and coversed sine functions

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Landon Curt Noll
2023-09-02 23:10:24 -07:00
parent b55d41c221
commit 8edff80826
3 changed files with 42 additions and 4 deletions
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22
qtrans.c
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@@ -1975,11 +1975,20 @@ qacoth(NUMBER *q, NUMBER *epsilon)
/*
* versed sine - this calls qsincos() and discards the value of sin.
* qversin - versed sine for NUMBER values
*
* This uses the formula:
*
* versin(x) = 1 - cos(x)
*
* This calls qsincos() and discards the value of sin.
*
* given:
* q real value to pass to the trig function
* epsilon error tolerance / precision for trig calculation
*
* returns:
* real value result of trig function on q with error epsilon
*/
NUMBER *
qversin(NUMBER *q, NUMBER *epsilon)
@@ -2006,11 +2015,20 @@ qversin(NUMBER *q, NUMBER *epsilon)
/*
* versed cosine - this calls qsincos() and discards the value of cos.
* qversin - coversed sine for NUMBER values
*
* This uses the formula:
*
* coversin(x) = 1 - sin(x)
*
* This calls qsincos() and discards the value of cos.
*
* given:
* q real value to pass to the trig function
* epsilon error tolerance / precision for trig calculation
*
* returns:
* real value result of trig function on q with error epsilon
*/
NUMBER *
qcoversin(NUMBER *q, NUMBER *epsilon)