4 public questions tagged with this topic.
We can see that we verify 62 by full calculation: use standard identity, substitute, simplify step by step to reach 62.
Ref: NCERT Mathematics Class XII — Applications of Derivatives
Understanding this is easy: using formula we get 1/2. Calculation gives this directly, check steps: apply rule, substitute values, simplify to get 1/2.
Ref: NCERT Mathematics Class XII — Applications of Derivatives
Here's the idea in simple terms: after simplifying, 2 is left. The method is simple: formula → substitution → calculation → answer.
Ref: NCERT Mathematics Class XII — Applications of Derivatives
Here's the idea in simple terms: put x=cosθ,y=sinθ. Expression becomes cos2θ+2sin2θ. Max =√(1²+2²)=√5. Complete transformation and max formula.
Ref: NCERT Mathematics Class XII — Applications of Derivatives
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