1. a) + = 1
= 1 - = 1 - = 1 - 1/16 = 15/16
|sin | = = 1/4 *
б) + = 1
= 1 - = 1 - = 1 - 4/9 = 5/9
|cos | = = 1/3 *
в) + = 1
= 1 - = 1 - = 1 - 3/4 = 1/4
sin = =
|tg | = sin / cos = (1/2) / (/2) = 1 /
2. a) + = 1/9 + 8/9 = 1 Лежит.
б) + = 3/4 + 3/4 = 6/4 1 Не лежит.
в) + = 4 + 9 = 13 1 Не лежит.
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Answers & Comments
1. a)
+
= 1
|sin
| =
= 1/4 * 
б)
+
= 1
|cos
| =
= 1/3 * 
в)
+
= 1
sin
=
= 
|tg
| = sin
/ cos
= (1/2) / (
/2) = 1 / 
2. a)
+
= 1/9 + 8/9 = 1 Лежит.
б)
+
= 3/4 + 3/4 = 6/4
1 Не лежит.
в)
+
= 4 + 9 = 13
1 Не лежит.