Posted by Marie on Wednesday, May 23, 2007 at 10:36pm.
could someone please tell me what the other angle identity of tan is? Thank you much!
"...other angle identity of tan x"?
in relation to which "other" ?
there are many identities dealing with the tangent.
The most important is probably
tan x = sin x/cos x
The Pythagorean Relationship would be
tan^2 x + 1 = sec^2 x
how about tan(2A) = 2tan A/(1-tan^2 A)
yes, i do know those, thank you. but my teacher told us that there is a specific identity for "the other angle". for example, the other angle identity of sinx = cos90-x. I believe the "other angle" identity for tanx is cot90-x but i'm not sure.
yes, you are right, tanx = cot(90-x)
if you are ever unsure about an identity like that pick an obscure angle such as 78.4º and test it with your calculator
tan 78.4 = 4.87162
cot(90-78.4)=cot 11.6º = 1/tan 11.6 = 4.87162
Answer this Question
physics - A 50 gram ice cube is cooled to -10oC in the freezer. How many ...
Science - A 50 gram ice cube is cooled to -10oC in the freezer. How many ...
Pre Cal - what does it mean when it says describe the end behavior of f and ...
Pre-Cal - What is the domain, range, zeros, symmetry, and is it even/odd of ...
pre-cal - Can someone please show me how to find an equation for the line with ...
pre cal - does anyone take pre-cal online ?
Pre-cal - 10.2 can someone show me this graph(x+2)^2/4+(y+2)^2/15=1
Pre-Medical - Can someone please tell me what the stndardized employability ...
Chemistry - Calculate S (measure of total entropy) for the following reaction at...
Chemistry Help!!!! - Calculate S (measure of total entropy) for the following ...