MaxCompute:COS

Static values

-- Returns 2.6794896585028633e-8 (cosine of pi/2, approximately 0)
select cos(3.1415926/2);

-- Returns -0.9999999999999986 (cosine of pi, approximately -1)
select cos(3.1415926);

-- Returns null
select cos(null);

Table data

This example uses the mf_math_fun_t table. To create the table and load sample data, run:

create table if not exists mf_math_fun_t(
    int_data     int,
    bigint_data  bigint,
    double_data  double,
    decimal_data decimal,
    float_data   float,
    string_data  string
   );
insert into mf_math_fun_t values
(null, -10, 0.525, 0.525BD, cast(0.525 as float), '10'),
(-20, null, -0.1, -0.1BD, cast(-0.1 as float), '-10'),
(0, -1, null, 20.45BD, cast(-1 as float), '30'),
(-40, 4, 0.89, null, cast(0.89 as float), '-30'),
(5, -50, -1, -1BD, null, '50'),
(-60, 6, 1.5, 1.5BD, cast(1.5 as float), '-50'),
(-1, -70, -7.5, -7.5BD, cast(-7.5 as float), null),
(-80, 1, -10.2, -10.2BD, cast(-10.2 as float), '-1'),
(9, -90, 2.58, 2.58BD, cast(2.58 as float), '0'),
(-100, 10, -5.8, -5.8BD, cast(-5.8 as float), '-90');

Calculate the cosine of values from multiple columns:

select
    cos(bigint_data) as bigint_new,
    cos(double_data) as double_new,
    cos(decimal_data) as decimal_new,
    cos(string_data) as string_new
from mf_math_fun_t;

Result:

+---------------------+--------------------+----------------------+---------------------+
| bigint_new          | double_new         | decimal_new          | string_new          |
+---------------------+--------------------+----------------------+---------------------+
| -0.8390715290764524 | 0.8653239416229412 | 0.8653239416229412   | -0.8390715290764524 |
| NULL                | 0.9950041652780258 | 0.9950041652780258   | -0.8390715290764524 |
| 0.5403023058681398  | NULL               | -0.02964340851507803 | 0.15425144988758405 |
| -0.6536436208636119 | 0.6294120265736969 | NULL                 | 0.15425144988758405 |
| 0.9649660284921133  | 0.5403023058681398 | 0.5403023058681398   | 0.9649660284921133  |
| 0.960170286650366   | 0.0707372016677029 | 0.0707372016677029   | 0.9649660284921133  |
| 0.6333192030862999  | 0.3466353178350258 | 0.3466353178350258   | NULL                |
| 0.5403023058681398  | -0.7142656520272003| -0.7142656520272003  | 0.5403023058681398  |
| -0.4480736161291701 | -0.8464080412157756| -0.8464080412157756  | 1.0                 |
| -0.8390715290764524 | 0.8855195169413189 | 0.8855195169413189   | -0.4480736161291701 |
+---------------------+--------------------+----------------------+---------------------+