Gon functions

Decide which numbers (values ​​of trigonometric functions) are positive or negative (or zero). Positive mark +1 and negative -1.

Correct answer:

sin (263°):  -1
cos (-288°):  1
sin (292°):  -1
cos (-459°):  -1
cos (100°):  -1
cos (790°):  1
cos (923°):  -1
sin (-38°):  -1
sin (154°):  1
cos (-331°):  1

Step-by-step explanation:

sin (263°) = -0.9925 < 0; 263 ° ... Q3; sin Q3 < 0
cos (-288°) = 0.309 > 0; -288 ° ... Q1; cos Q1 > 0
sin (292°) = -0.9272 < 0; 292 ° ... Q4; sin Q4 < 0
cos (-459°) = -0.1564 < 0; -459 ° ... Q3; cos Q3 < 0
cos (100°) = -0.1736 < 0; 100 ° ... Q2; cos Q2 < 0
cos (790°) = 0.342 > 0; 790 ° ... Q1; cos Q1 > 0
cos (923°) = -0.9205 < 0; 923 ° ... Q3; cos Q3 < 0
sin (-38°) = -0.6157 < 0; -38 ° ... Q4; sin Q4 < 0
sin (154°) = 0.4384 > 0; 154 ° ... Q2; sin Q2 > 0
cos (-331°) = 0.8746 > 0; -331 ° ... Q1; cos Q1 > 0

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You need to know the following knowledge to solve this word math problem:

arithmeticplanimetricsbasic operations and conceptsgoniometry and trigonometryUnits of physical quantitiesGrade of the word problem

 
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