Posted by **Jarred** on Saturday, January 16, 2010 at 7:45pm.

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 -
**Damon**, Saturday, January 16, 2010 at 8:33pm
1. Use a reference triangle to find the given angle.

cos -1 (1/2) give an exact answer in terms of pi

adjacent/hypotenuse = 1/2

well, if you know about 30,60,90 triangle the answer is immediate.

sin 30 degrees = 1/2

cos 60 degrees = 1/2

60 degrees = pi/3 radians

- Calculus -
**Damon**, Saturday, January 16, 2010 at 8:36pm
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 -
**Damon**, Saturday, January 16, 2010 at 8:40pm
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

## Answer this Question

## Related Questions

- math-calculus - 1.For any function y+f(x), express dy/dx using limit notation. ...
- calculus - My a.p. calculus teacher doesn't know how to do this problem (like ...
- Calculus - I need help with finding first and second derivative--simplify your ...
- calculus--please helpp - if the line 3x-4y=0 is tangent in hte first quadrant to...
- physics - For some reason i cant get this question. If someone can help that ...
- Finite Math - Fifty percent of students enrolled in calculus class have ...
- Calculus - I need to take a college calculus class. Can someone direct me to a ...
- English - Which of the following is a correctly written compound word? 1) Thirty...
- Calculus: Derivatives - I'm having trouble understanding what derivatives in ...
- calculus - i'm having trouble with a problem in my calc class...it isn't really ...

More Related Questions