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Math Help - Find the minumum and Maximum value of

  1. #1
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    Find the minumum and Maximum value of

    2^sin x + 2^cos x......where ^ is symbol for 'to the power'
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  2. #2
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    Can you solve where (2^{sin x} + 2^{cos x})'=0 ??
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  3. #3
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    a..certainly I can I can use differential and..but like if I take the 2 numbers in A.P.....then by using A.P.>GP...
    2^{sin x}+2^{cos x} >=2^{1-1/sqrt(2)}

    so I am able to get the minimum value...but is there an algebraic way to solve it...not using calculus...I am rather uncomfortable with calculus if it goes complex.
    Last edited by ShubhamMishra; May 13th 2010 at 10:13 PM. Reason: I did not complete it....
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  4. #4
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    Quote Originally Posted by ShubhamMishra View Post
    a..certainly I can I can use differential and..but like if I take the 2 numbers in A.P.....then by using A.P.>GP...
    2^{sin x}+2^{cos x} >=2^{1-1/sqrt(2)}

    so I am able to get the minimum value...but is there an algebraic way to solve it...not using calculus...I am rather uncomfortable with calculus if it goes complex.
    sin(x) and cos(x) are equal when x = π/4. The value is \frac{1}{\sqrt{2}

    sin(x) and cos(x) are equal but having opposite sign when x = 3π/4.

    Hence maximum value of 2^{sin(x)} + 2^{cos(x)} = 2\times2^\frac{1}{\sqrt{2}}

    Minimum value is 2^\frac{1}{\sqrt{2}} + 2^\frac{-1}{\sqrt{2}}
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