Q. 125.0( 1 Vote )

# Mark the correct alternative in the following:

If f(x) = cos (log x), then value of is

A. 1

B. -1

C. 0

D. ± 1

Answer :

Now,

Using:

=cos(log x) cos(log 4)-cos(log x)cos(4)

=0

Option C is correct..

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Let f(x) = 2x + 5 and g(x) = x^{2} + x. Describe

i. f + g

ii. f – g

iii. fg

iv.

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