Question
In the interval the equation has
- no solution
- a unique solution
- two solutions
- infinitely many solutions
Hint:
In this question, we have given that in the interval of . We have to find it which type of solution it has. We know that then we can take antilog, b = ca. Using find the solution of equation.
The correct answer is: a unique solution
Here we have to find it which type of solution it has.
Firstly, we have given,
We know if then we can take antilog, b = ca
So, we can write,
Cos2 θ = sin2 θ
1 – 2 sin2 θ = sin2 θ [ since, cos2 θ = 1 – 2 sin2 θ ]
3sin2 θ = 1
sin2 θ =
sin θ = ±
Base of log is never negative,
sin θ =
Therefore, it has only one solution, that means it has unique solution.
The correct answer is a unique solution.
In this question, we have to find type of solution, here, we know if then we can take antilog, b = ca, and cos2 θ = 1 – 2 sin2 θ . Remember these terms and find the solution easily.
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