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Find the value of (a) sin(pi)/(10)+sin...

Find the value of
(a) `sin(pi)/(10)+sin(13pi)/(10)` (b) `cos^(2)48^(@)=sin^(2) 12^(@)`

Text Solution

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a) `-1/2` , b) `(sqrt(5)+1)/8`
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ALLEN-BASIC MATHS,LOGARITHIM, TRIGNOMETRIC RATIO AND IDENTITIES AND TRIGNOMETRIC EQUATION -DO YOURSELF 9
  1. Find the value of (a) sin(pi)/(10)+sin(13pi)/(10) (b) cos^(2)48^(@)=...

    Text Solution

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