Jon

Hi there, I'm stumped on these two questions. Left side needs to equal right side at the end.

11. e) (1+tan)/1+cot) = (1-tan)/(cot-1)

f) tan/(cos-sec) = -csc

Any help is really appreciated, thanks in advance!

Math 12 Identities help please?

Hey, need a little help with this identity, can't seem to solve it...

Prove that the left side = right side

6c.) (sin + tan)/(cos + 1) = tan

Any help appreciated! Thanks so much!

11. b) cos (-5pi/4)

How do I solve this?

Please and thanks :)

Not sure how to do this, help please?

18. Determine the inverse function of f(x) = 3^(x-1) - 2

Thanks in advance!

How do I do this?

14. A major earthquake of magnitude 8.3 is 120 times as intense as a minor earthquake. Determine the magnitude , to the nearest tenth, of the minor earthquake.

Any help is really appreciated! Please and thanks!

Argh! This question is getting on my nerves. Help please?

11. A radioactive substance decays to 30% of its original mass in 15 months. Determine the half life of this radioactive substance to the nearest month.

Thanks! Any help appreciated...

Hey there, having some trouble with factoring a few stubborn math equations, can someone please give me a hand?

And by factoring, I mean: x^2 - x - 12 becomes (X-4)(X+3)

27. x^2 - x - 13

31. x^2 - 6x - 8

Any help is really appreciated!

Having a little trouble with this question.

25. Explain why the mechanism for the reaction below would probably involve more than the one step implied by the equation. 2NO (g) + Br2 (g) = 2NOBr (g)

I have no clue why this would take more than one step, seems so simple. Anyways, any help is appreciated. Thanks

Ok, having a little trouble with this equation. Can someone help me out?

25. Hydrogen and oxygen gas react in a fuel cell to produce water according to the following equation:

2H2(g) + O2(g) = 2H20(l)

If the rate of water PRODUCTION is 1.34 mol/min, what is the rate of oxygen gas CONSUMPTION express in mol/min?

Any help would really be appreciated... Thanks!!!

Hey there, need some help with the transformations of functions.

What do the following do to y=f(x)?

1. y= -1/2f(x)

2. x= f(y)

3. y= lf(x)l <--- The l's on the side are absolute value signs

4. y= f(2x-6)+4

5. y= 1 / lf(x)l

6. y= 2lf(x)l-3

Please answer any or all of these questions if you can! Thanks!

I don't remember what y=f(1/2x) does to y=fx. Does it expand it? Contract it? and if so, it what directions?

My TI-83 Plus Calculator has a problem. On the final part of a Physics 11 question, I have to put in 100cos30. The answer key says the result of that is 86.6.... BUT my calculator says it's 15.425. Happens on sin as well (have to put in 100sin30, answer is 50 but my calculator says -98.8). is my calculator having issues? Help please!!!

A= -9.8m/s

Vi= 0m/s

D= 5.3 x 10^2 m

T=?

Original Question: A very frustrated physics student drops a physics textbook off the top of the

CN tower. If the tower is 5.3 x 10^2m high, how long will the book take to reach the ground, assuming there is negligible air resistance? (g = 9.8 m/s^2)

What formula(s) would I use?

Velocity Initial: 80 km/h

Velocity Final: 50 km/h

Distance: 150m

Need: Acceleration/Deceleration

Original Question: "The driver of a car notes the car’s speed to be 80 km/h in a 50 km/h zone.

Just then, the driver notices a police car sitting behind a tree 150m away and

immediately releases the gas and hits the brakes. What must be the deceleration

of the car if the police are to time its speed at 50 km/h"

What formula(s) would I use?

Velocity = 150m/s

Distance = 3.5cm

Need Acceleration and Time

Original Question: " A bullet moving with a speed of 150 m/s strikes a tree and penetrates 3.5 cm

before stopping. Determine its acceleration and the time taken to stop"

What equation(s) would I use?

What equation(s) do I use? The original question is " A car initially at rest travels a distance of 30.0 m in 8.0 s with uniform acceleration. Determine the magnitude of the acceleration of the car (in m/s^2)"