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Mathematics : Limits and Derivatives

Short Answer Type

71.

Find the derivatives of the following functions :

5 sec x + 4 cos x

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72.

Find the derivatives of the following functions :

sin x cos x

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73.

Find the derivatives of the following functions :

2 tan x - 7 sec x

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74. Find the derivatives of the following functions :

space space space space space space space space fraction numerator sec space straight x space minus 1 over denominator sec space straight x space plus 1 end fraction

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75. Find the derivatives of the following functions :

space space space space fraction numerator sin left parenthesis straight x plus straight a right parenthesis over denominator cos space straight x end fraction

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76. Find the derivatives of the following functions :

(ax²+sin x) (p + q cos x)

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77. Find the derivatives of the following functions :

"<pre

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78. Find the derivatives of the following functions :

(x + sec x)(x - tan x)

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79. Find the derivatives of the following functions :

space space space space space space space space space space space space space space space space space space fraction numerator straight x over denominator 1 plus tan space straight x end fraction

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80.

Evaluate the following limits :

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