Question

Find the exact value of the expression 1 + cot^2(30*) -sec^2(45*)

Answer 1

I knew that you were an idiot

Answer 2

Oh my god.

Use identities if you have to. Also remember that a trigfcn^2(angle) is the same thing as (trigfcn(angle))^2, so try evaluating the non-squared thing, and then square the answer.

Answer 3

I tried it but I didnt get the correct answer

Answer 4

@jim_thompson5910

Answer 5

@Outkast3r09

Answer 6

*pulls up trig identity sheet lol

Answer 7

here's a good list of them

http://www.sosmath.com/trig/Trig5/trig5/trig5.html

Answer 8

So how do I utilize it?

Answer 9

I use the cheat sheet from lamar edu AKA pauls notes

Answer 10

http://tutorial.math.lamar.edu/pdf/Trig_Cheat_Sheet.pdf

Answer 11

Can you show me the steps please

Answer 12

for? i never answered it the first time?

Answer 13

use pythagoreans theorem on the tan

Answer 14

sec^2 i mean

Answer 15

This one is messed up in my head :(

Answer 16

that should get you some values you can evaluate in terms of cos

Answer 17

You need to know the value of special angles.


sec is 1/cos
cot is 1/tan