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# Gah!! I need help ASAP with me review!

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Okay I have midterms coming up, my math teacher wont help for **** and Im worried because I dont really get this and my exam is on Wed.....plus it doesnt help that I misplaced my notes somewhere :cup: .I asked my dad, he doesnt remember so Im hoping someone here will remember trigonometry/precal stuff.

@ = my ghetto version of theta

First question:

How do you you find the first derivitive of the following equation...

y = -7x^3 + 9x^2 + 3x -8

2nd:

Write the equation of the line tangent to the graph of f(x)= 4x^2 - 7x + 2

at (1,-1)...express in y=mx +b form

3rd:

State the quadrant where sec @ > 0 and tan @ < 0

4th:

If (-3.-4) is a point on the terminal side of @ , sketch a right triangle and find the six trigonometric functions of @

5th and final:

Evaluate the following :

cos 17/6 pi

cot pi/2

csc 5/3 pi

sin(pi)

Thanks in advance for anyone willing to take the challenge

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Well, for the first one, you need to know that the the derivative of an equation with form ax^b is equal to abx^(b-1), and the derivative of a constant is zero (because the slope of a constant never changes).

For the second one, remember that the derivative gives you the instantaneous slope. So first find the derivative, find the slope at the point, then find the y-intercept.

3,4,and 5 simply require that you remember your unit circle. You do remember your unit circle, right?

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Well, for the first one, you need to know that the the derivative of an equation with form ax^b is equal to abx^(b-1), and the derivative of a constant is zero (because the slope of a constant never changes).

For the second one, remember that the derivative gives you the instantaneous slope. So first find the derivative, find the slope at the point, then find the y-intercept.

3,4,and 5 simply require that you remember your unit circle. You do remember your unit circle, right?

Yes, I get it....but thats not the derivitives I was talking about...or perhaps you just used a different formula. The unit circle stuff is easy...I got this down. thnx

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