1800-150-456-789
FlagBACK
Flag Trigonometry> I have confusion between undefined and in...
question mark

I have confusion between undefined and infinite. For example,tan 90 degrees is undefined or infinite?Please clarify my doubt.

Chintapalli David Raju , 8 Years ago
Grade 12th pass
anser 1 Answers
Ajay

Last Activity: 8 Years ago

Tha 90 is undefined because tan90 have different values when we approach it from different side of 90 as shown. Since there right hand and left hand limits of tanx at x= 90 are not same, tan90 is not deifined.
 
\lim _{ h->0 }{ \quad tan(90+h)\quad } =\quad \lim _{ h->0 }{ \quad -cot(h) } \quad =\quad -\infty \\ \lim _{ h->0 }{ \quad tan(90-h)\quad } =\quad \lim _{ h->0 }{ \quad cot(h) } \quad =\quad +\infty

Provide a better Answer & Earn Cool Goodies

star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Ask a Doubt

Get your questions answered by the expert for free

Other Related Questions on trigonometry

question mark
In ABC, if cot A+cot B+cot C = cosecA cosecB cosecC, then prove that ABC is right angle triangle.
trigonometry
1 Answer Available

Last Activity: 2 Years ago

question mark
  • Find the general solution of equation tan3∂=cot2∂
For all angles between -720 and +720
trigonometry
0 Answer Available

Last Activity: 2 Years ago

question mark
To prove : Cosec(45 degree - A)Cosec(45 degree + A) = 2SecA
trigonometry
0 Answer Available

Last Activity: 2 Years ago

question mark
cos^2 13ºcos^2 47º+cos^2 73º =? …..................
trigonometry
0 Answer Available

Last Activity: 3 Years ago

question mark
Derive a formula for the area of the triangle, given b, A, B, and C. That is, derive the formula: (b^2sinAsinC)/(2sinB)
trigonometry
0 Answer Available

Last Activity: 3 Years ago