# Calculus

posted by .

This is my first calculus class and I am lost on how to answer these. The book isn't giving me a clear explanation for help. Any help someone could provide would be great!

1. Use a reference triangle to find the given angle.
cos -1 (1/2) give an exact answer in terms of pi

2. Express In 0.25 in terms of In 2 and In 3. Simplify your answer. Use integers or fractions for any number in the answer.

3. Determine whether the function is even, odd or neither.
f(x)=4x^5 + 3x^3

Thank you!!!!

• Calculus -

1. Use a reference triangle to find the given angle.
cos -1 (1/2) give an exact answer in terms of pi

sin 30 degrees = 1/2
cos 60 degrees = 1/2

• Calculus -

2. Express In 0.25 in terms of In 2 and In 3. Simplify your answer. Use integers or fractions for any number in the answer.

ln (1/4) = ln 1 - ln 4 = 0 - ln 4

-ln 4 = -2 ln 2

• Calculus -

3. Determine whether the function is even, odd or neither.
f(x)=4x^5 + 3x^3

For negative x, this function is negative of the corresponding value for positive x
Therefore it is ODD
In general odd powers of x are odd and even powers of x are even
eg
f(x ) = +x
f(-x) = -x odd

f(x ) = + x^2
f(-x) = + x^2 even

## Similar Questions

1. ### calculus

My a.p. calculus teacher doesn't know how to do this problem (like many others) so he's giving us 5 points extra credit on our test if we can figure it out, but I don't know how to do it: It's as the lim-->infinity (x+sinx)/(x+cosx) …
2. ### math-calculus

1.For any function y+f(x), express dy/dx using limit notation. Give a clear explanation for your given answer. you probably meant to type y=f(x) By definition dy/dx = Limit (f(x+∆x) - f(x))/∆x as ∆x-->0 The explanation …
3. ### Calculus

I need to take a college calculus class. Can someone direct me to a site which might help me get a good start?
4. ### physics

For some reason i cant get this question. If someone can help that would be great. Thanks. In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 3.5 …
5. ### Calculus

I need help with finding first and second derivative--simplify your answer. Y=xtan(x) I solved first derivative xsec^2(x) + tan(x) I don't understand how to get the first...can someone show me the steps with explanation?

if the line 3x-4y=0 is tangent in the first quadrant to the curve y=x^3+k, find k. all i know is that its related to finding a derivative and i m basically completely lost....can please someone provide me some help?
7. ### Finite Math

Fifty percent of students enrolled in calculus class have previously taken pre-calculus. Thirty percent of these students received an A for the calculus class, whereas twenty percent of the other students received an A for calculus. …
8. ### Calculus

How do I use three vertices to calculate the area of a triangle?
9. ### Integral Calculus

We can use this power series to approximate the constant pi: arctan(x) = (summation from n = 1 to infinity) of ((-1)^n * x^(2n+1))/(2n+1) a) First evaluate arctan(1) without the given series. (I know this is pi/4) b) Use your answer …
10. ### Writing Skills

The call number of the book that you're looking for is R865.2. What do you know about the book based on this information?

More Similar Questions

Post a New Question