Posted by **jerson** on Monday, May 19, 2008 at 6:32pm.

Find the exact value of cot 45°, if the expression is undefined write undefined.

- trig -
**Damon**, Monday, May 19, 2008 at 6:43pm
in an isosceles right triangle the angles are 45,45,90

if the two legs have length x, then the hypotenuse has length sqrt(x^2+x^2) = x sqrt 2

so

tan 45 = x/x = 1

cot 45 = 1/tan 45 = 1/1 = 1

sin 45 = x /xsqrt 2 = sqrt 2/2

cos 45 =sqrt 2/2

sec 45 = 1/cos 45 = sqrt 2

csc 45 =1/sin 45 = sqrt 2

- trig -
**Damon**, Monday, May 19, 2008 at 6:52pm
yes, that is what I said. Cot 45 = 1/tan 45 = 1

I also did the other trig functions of 45 because I am sure you will need them.

- trig -
**Anonymous**, Thursday, December 20, 2012 at 9:19am
find the value exact of cot 45.If the expression is underfined

## Answer This Question

## Related Questions

- Check Math Answers - What are the values of the trigometric functions; The ...
- Algebra-Undefined - Find all numbers for which the rational expression is ...
- Math - Use an addition or subtraction formula to write the expression as a ...
- undefined? - f(x) = x^3 - 2x, x<=2 x + 2, x>2 Why do they say f'(2) is ...
- precalc - Find the exact value of each expression, if it exists: the -1 are ...
- Advanced Functions 122 - For what values of x is an element of real numbers, ...
- math - Am I correct to say that 5/0 = 5 or is it undefined no your ar incorrect ...
- algebra - 3/0 =? the answer is 0 but my options are to solve the equation if ...
- Algebra 2 - Find a value(s) that makes the expression y^2 - 16 ---------- ...
- math - Find the slope of the line. (If an answer is undefined, enter UNDEFINED...

More Related Questions