 Click to Chat

1800-2000-838

+91-120-4616500

CART 0

• 0

MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
```        Q.1 tanx + tan 2x + tan 3x = 0
Q.2 sec x - 1 = ( 1.414 - 1) tanx
Ans. 1.   n3.14/3, [ n3.14  (+-)  tan inverse 1/1.414]
ans 2.   2n3.14 + 3.14/4```
8 years ago

## Answers : (2)

```							Dear student
tanx+tan2x+tan3x=0
(tanx+tan2x)(1-tanxtan2x)/((1-tanxtan2x)+tan3x=0
tan3x(1-tanxtan2x)+tan3x=0
so we get
either tan3x=0 ortanxtan2x=2
Solve for x....

Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.
All the best.
Win exciting gifts by                                                       answering the      questions    on            Discussion        Forum.    So      help               discuss         any                query   on        askiitians       forum    and         become  an       Elite            Expert       League                askiitian.

Sagar Singh
B.Tech, IIT Delhi
sagarsingh24.iitd@gmail.com

```
8 years ago
```							 tanx + tan2x+ tan3x=0or, tanx+ tan2x= - tan3xor, (sinx/cosx)+(sin 2x /Cos 2x)=-(sin 3x /cos 3x)or, (sin x *cos 2 X + cos x *sin 2x)/cos x * cos 2x = -sin 3x / cos 3xor, sin( 2x+x)* cos 3x= - cos x *cos 2x *sin 3xor, sin 3x*cos 3x+ cos x * cos 2x *sin 3x =0or, sin 3x ( cos 3x + cos x *cos 2x)=0or, sin 3x (cos ( 2x + x)+ cos x * cos 2x)=0or, sin 3x (cos x *cos 2x - sin x *sin 2x+ cos x *cos 2x) =0or, -sin 3x *sin x * sin 2x=0 Either sin3x=0i.e, 3x=nπi.e, X=nπ/3 or, sin 2x=0i.e, 2x=nπi.e, X= nπ/2 or, sin x= 0i.e, X=nπRequired solution is X= nπ/3
```
9 months ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies

## Other Related Questions on Trigonometry

View all Questions »  ### Course Features

• 731 Video Lectures
• Revision Notes
• Previous Year Papers
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Test paper with Video Solution  ### Course Features

• 31 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions