TS EAMCET · Maths · Trigonometric Equations
The equation has a solution if
- A
- B
- C is any positive integer
- D
Answer & Solution
Correct Answer
(B)
Step-by-step Solution
Detailed explanation
Given: The equation sin4x-k+3sin2x-k-4=0 has a solution It is a quadratic equation in sin2x So, sin2x=k+3±k+32+4k+42 =k+3±k+522 =k+3±k+52=k+4, -2 but sin2x∈0,1 ⇒0≤k+4≤1⇒-4≤k≤-3.
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