Which trigonometric function is equivalent to f(x)=sinx ?

f(x)=cos(x-3pi/2)
f(x)=cos(x-pi/2)
f(x)=cos(-x-pi/2) < -- i think this one, not sure
f(x)=cos(x+pi)

 The correct option is (B)

Step-by-step explanation:  We are given to select the correct trigonometric function that is equivalent to the following trigonometric function :

Option (A) :

Here, the given function is

So, this option is incorrect.

Option (B) :

Here, the given function is

So, this option is CORRECT.

Option (C) :

Here, the given function is

So, this option is incorrect.

Option (D) :

Here, the given function is

So, this option is incorrect.

Thus, (B) is the correct option.

stew reads at the fastest rate of 265 words per minute.

step-by-step explanation:

it's a given that felicia reads at 260 word per minute and on connie's graph we can see that she reads 200 words per minute. since stew's table tells us that he read 795 in 3 minutes, we can divide 795 by 3 to find out how many words he reads per minute.

795/3 = 265

stew reads 265 words per minute - he reads at the fastest rate since felecia reads at 260 words per minute and connie reads at 200 words per minute.

stew (265) > felecia (260) > connie (200)