PreCalculus
posted by Iris
A.Verify the identity.
B.Determine if the identity is true for the given value of x. Explain.
Sec(x) / tan(x) = tan(x) / [tan(x) – cos(x)],x = π
I already solved A and I believe it's true; however, I need help with B.

Steve
clearly B is false at x=π
Sec(x) / tan(x) = tan(x) / [tan(x) – cos(x)]
(1)/0 = 0/(0(1)) = 0/1
∞ = 0
I don't think so!
Respond to this Question
Similar Questions

Integration
Intergrate ¡ì sec^3(x) dx could anybody please check this answer. are the steps correct? 
Pre Cal
could someone please tell me what the other angle identity of tan is? 
Trigonometry
How do you verify the equation is an identity? 
Pre Calculus
Verify the identity: cos x + sin x tan x = sec x. 
Trigonometry
1.Solve tan^2x + tan x – 1 = 0 for the principal value(s) to two decimal places. 6.Prove that tan y cos^2 y + sin^2y/sin y = cos y + sin y 10.Prove that 1+tanθ/1tanθ = sec^2θ+2tanθ/1tan^2θ 17.Prove that … 
precalculus
For each of the following determine whether or not it is an identity and prove your result. a. cos(x)sec(x)sin^2(x)=cos^2(x) b. tan(x+(pi/4))= (tan(x)+1)/(1tan(x)) c. (cos(x+y))/(cos(xy))= (1tan(x)tan(y))/(1+tan(x)tan(y)) d. (tan(x)+sin(x))/(1+cos(x))=tan(x) … 
PreCalc : Verify the Identity
Verify the Identity: sin(x+π)/cos(x+3π/2) =tan^2xsec^2x I've done: sinxcosπ+cosxsinπ / cosxcos(3π/2)  sinxsin(3π/2) sinx(1) + cosx(0) / cosx(0) sinx(1) sinx/sinx What do I do from here? 
Trigonometry desperate help, clueless girl here
2. solve cos 2x3sin x cos 2x=0 for the principal values to two decimal places. 3. solve tan^2 + tan x1= 0 for the principal values to two decimal places. 4. Prove that tan^2(x) 1 + cos^2(x) = tan^2(x) sin^2 (x). 5.Prove that tan(x) … 
PreCalculus
A.Verify the identity. B.Determine if the identity is true for the given value of x. Explain. [cot(x) – 1] / [cot(x) + 1] = [1 – tan(x)] / [1 + tan(x)], x = π/4 I solved A and I believe it's true; however, I need help with … 
PreCalculus
Verify the identity. cos x  sec x = sin x tan x So far I have applied a reciprocal identity =cos x  1/cos x I know I must combine using the least common denominator but I don't know how it would be written.