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.

d) the triangle is a right triangle 60 squared +144 squared= 156 squared

step-by-step explanation:

156 squared is the hypothenuse

so 156= c

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !