TS EAMCET · Maths · Trigonometric Ratios & Identities
Let If and are the minimum and maximum values of respectively, then
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
y=4sin2θ-cos2θ=4sin2θ-1-2sin2θ y=6sin2θ-1 ∴sin2θ=y+16 ∵0≤sin2θ≤1 ⇒0≤y+16≤1 ⇒-1≤y≤5 Therefore, Minimum value of y=l=-1 And, Maximum value of y=m=5 Now, lm=-5 & ml=-5…
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