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(i) If y= 6x^(5) -4x^(4) -2x^(2) +5x -...

(i) If ` y= 6x^(5) -4x^(4) -2x^(2) +5x -9 " find " (dy)/(dx) at x = -1`
(ii) If ` y = (sin x + tan x) , " find " (dy)/(dx) at x = pi/4`
(iii) If `y = ((2 -3 cos x))/sin x , " find " (dy)/(dx) at x = pi/4`

Text Solution

Verified by Experts

The correct Answer is:
(i) 55 (ii) 9/2 (iii) ` 2(3 -sqrt2)`
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