表达式10: "r" left parenthesis, theta , right parenthesis equals StartFraction, 1 half left parenthesis, StartNestedFraction, 1 NestedOver cos left parenthesis, theta minus 60 minus left parenthesis, 2 times 60 , right parenthesis , right parenthesis , EndNestedFraction , right parenthesis Over StartNestedFraction, 1 NestedOver StartRoot, 2 , EndRoot , EndNestedFraction left parenthesis, StartNestedFraction, 1 NestedOver cos left parenthesis, theta minus 45 minus left parenthesis, 4 times 45 , right parenthesis , right parenthesis , EndNestedFraction , right parenthesis , EndFraction left brace, 180 less than or equal to theta less than or equal to 240 , right bracerθ=121cosθ−60−2·60121cosθ−45−4·45180≤θ≤240
180180
定义域\theta最小值：
less than or equal to theta less than or equal to≤θ≤
240240
定义域\theta最大值：
10
表达式11: "r" left parenthesis, theta , right parenthesis equals StartFraction, 1 half left parenthesis, StartNestedFraction, 1 NestedOver cos left parenthesis, theta minus 60 minus left parenthesis, 4 times 60 , right parenthesis , right parenthesis , EndNestedFraction , right parenthesis Over StartNestedFraction, 1 NestedOver StartRoot, 2 , EndRoot , EndNestedFraction left parenthesis, StartNestedFraction, 1 NestedOver cos left parenthesis, theta minus 45 minus left parenthesis, 4 times 45 , right parenthesis , right parenthesis , EndNestedFraction , right parenthesis , EndFraction left brace, 240 less than or equal to theta less than or equal to 270 , right bracerθ=121cosθ−60−4·60121cosθ−45−4·45240≤θ≤270
240240
定义域\theta最小值：
less than or equal to theta less than or equal to≤θ≤
270270
定义域\theta最大值：
11
表达式12: "r" left parenthesis, theta , right parenthesis equals StartFraction, 1 half left parenthesis, StartNestedFraction, 1 NestedOver cos left parenthesis, theta minus 60 minus left parenthesis, 4 times 60 , right parenthesis , right parenthesis , EndNestedFraction , right parenthesis Over StartNestedFraction, 1 NestedOver StartRoot, 2 , EndRoot , EndNestedFraction left parenthesis, StartNestedFraction, 1 NestedOver cos left parenthesis, theta minus 45 minus left parenthesis, 6 times 45 , right parenthesis , right parenthesis , EndNestedFraction , right parenthesis , EndFraction left brace, 270 less than or equal to theta less than or equal to 360 , right bracerθ=121cosθ−60−4·60121cosθ−45−6·45270≤θ≤360
270270
定义域\theta最小值：
less than or equal to theta less than or equal to≤θ≤
360360
定义域\theta最大值：
12
表达式13: "r" left parenthesis, theta , right parenthesis equals 1 half left parenthesis, StartFraction, 1 Over cos left parenthesis, theta minus 60 , right parenthesis , EndFraction , right parenthesisrθ=121cosθ−60
定义域\theta最小值： 00
less than or equal to theta less than or equal to≤θ≤
定义域\theta最大值： 120120
13
表达式14: "r" left parenthesis, theta , right parenthesis equals 1 half left parenthesis, StartFraction, 1 Over cos left parenthesis, theta minus 60 minus left parenthesis, 2 times 60 , right parenthesis , right parenthesis , EndFraction , right parenthesisrθ=121cosθ−60−2·60
定义域\theta最小值： 120120
less than or equal to theta less than or equal to≤θ≤
定义域\theta最大值： 240240
14
表达式15: "r" left parenthesis, theta , right parenthesis equals 1 half left parenthesis, StartFraction, 1 Over cos left parenthesis, theta minus 60 minus left parenthesis, 4 times 60 , right parenthesis , right parenthesis , EndFraction , right parenthesisrθ=121cosθ−60−4·60
定义域\theta最小值： 240240
less than or equal to theta less than or equal to≤θ≤
定义域\theta最大值： 360360
15
表达式16: "r" left parenthesis, theta , right parenthesis equals StartFraction, 1 Over StartRoot, 2 , EndRoot , EndFraction left parenthesis, StartFraction, 1 Over cos left parenthesis, theta minus 45 , right parenthesis , EndFraction , right parenthesisrθ=121cosθ−45
定义域\theta最小值： 00
less than or equal to theta less than or equal to≤θ≤
定义域\theta最大值： 9090
16
表达式17: "r" left parenthesis, theta , right parenthesis equals StartFraction, 1 Over StartRoot, 2 , EndRoot , EndFraction left parenthesis, StartFraction, 1 Over cos left parenthesis, theta minus 45 minus left parenthesis, 2 times 45 , right parenthesis , right parenthesis , EndFraction , right parenthesisrθ=121cosθ−45−2·45
定义域\theta最小值： 9090
less than or equal to theta less than or equal to≤θ≤
定义域\theta最大值： 180180
17
表达式18: "r" left parenthesis, theta , right parenthesis equals StartFraction, 1 Over StartRoot, 2 , EndRoot , EndFraction left parenthesis, StartFraction, 1 Over cos left parenthesis, theta minus 45 minus left parenthesis, 4 times 45 , right parenthesis , right parenthesis , EndFraction , right parenthesisrθ=121cosθ−45−4·45
定义域\theta最小值： 180180
less than or equal to theta less than or equal to≤θ≤
定义域\theta最大值： 270270
18
表达式19: "r" left parenthesis, theta , right parenthesis equals StartFraction, 1 Over StartRoot, 2 , EndRoot , EndFraction left parenthesis, StartFraction, 1 Over cos left parenthesis, theta minus 45 minus left parenthesis, 6 times 45 , right parenthesis , right parenthesis , EndFraction , right parenthesisrθ=121cosθ−45−6·45
定义域\theta最小值： 270270
less than or equal to theta less than or equal to≤θ≤
