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6.13.1 dacos, dasin, datan, dcos, dsin, dtan

dacos(num)
:: 函数値 Arccos(num) を求める.
dasin(num)
:: 函数値 Arcsin(num) を求める.
datan(num)
:: 函数値 Arctan(num) を求める.
dcos(num)
:: 函数値 cos(num) を求める.
dsin(num)
:: 函数値 sin(num) を求める.
dtan(num)
:: 函数値 tan(num) を求める.

return
倍精度浮動小数
num

 
[0] 4*datan(1);
3.14159



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