Question 16 (Essay Worth 7 points)

Verify the identity.

tan (x + π/2) = -cot x

Step-by-step explanation:

We know that tan=sin/cos, so tan(x+π/2)=

Then, we know that sin(u+v)=sin(u)cos(v)+cos(u)sin(v),

so our equation is then

Then, cos(u+v)=cos(u)cos(v)-sin(u)sin(v), so our expression is then

they disappear if your absent from to long. i found out that the hard way.

step-by-step explanation:

brainliest lol i just need one more brainliest.

twenty-six miles over two gallons because the proportion for the original 13 miles to one gallon would be written 13/1 and, doing the same thing to the top and bottom, i multiplied by 2 and got 26/2