Question

Solve problems on Trigonometric ratios and identities

Question 2 please

Answer 1

Answer:

The range will be f(θ) = [1, √2 ]

Step-by-step explanation:

Let's find the first two derivatives of f(θ) wrt θ.  

Find values of θ when f '(θ) becomes 0.  

    For f ''(θ) for those above values and then :

         If f ''(θ) is negative then f(θ) value is a local maximum.

        If f ''(θ) is positive then f(θ) is a local minimum.

  Please see the enclosed picture for detailed answer.

Answer 2

Answer:

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