Overview: 3 questions will be solved this time.Among them
☆2 inequalities
☆1 equations
[ 1/3 Equation]
Work: Find the solution of equation sinx = 2*sin(3*x-30) .
Question type: Equation
Solution:
The solution of the equation:
x1≈-4.490915 , keep 6 decimal places
x2≈-3.703446 , keep 6 decimal places
x3≈-2.646344 , keep 6 decimal places
x4≈-1.349322 , keep 6 decimal places
x5≈-0.561853 , keep 6 decimal places
x6≈0.495249 , keep 6 decimal places
x7≈1.792271 , keep 6 decimal places
x8≈2.579739 , keep 6 decimal places
x9≈3.636841 , keep 6 decimal places
x10≈4.933863 , keep 6 decimal places
There are 10 solution(s). *Note: Radian.
解程的详细方法请参阅:《方程的解法》[ 2/3Inequality]
Assignment:Find the solution set of inequality x >0 .
Question type: Inequality
Solution:
The inequality can be reduced to 1 inequality:
x >0 (1)
From inequality(1):
x > 0
The final solution set is :
x > 0[ 3/3Inequality]
Assignment:Find the solution set of inequality x <360 .
Question type: Inequality
Solution:
The inequality can be reduced to 1 inequality:
x <360 (1)
From inequality(1):
x < 360
The final solution set is :
x < 360Your problem has not been solved here? Please go to the Hot Problems section!