### Enroll For Free Now & Improve Your Performance.

×

#### Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.

Click to Chat

1800-1023-196

+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
Menu
Grade: 11
```
If sin x +7 cos x=5 then tan(x/2) is a root of equation
If sin x +7 cos x=5 then tan(x/2) is a root of equation

```
3 years ago

## Answers : (1)

RISHIKESH VERMA
26 Points
```							we know formula   sinx=2*tan(x)/2/(1+tan^x/2)    and cosx=( 1-tan^(x/2))/(1+tan^2(x/2))let’s assume that tanx/2=pput this value in given equation2p/(1+p^2) + 7(1-p^2)/(1+p^2) =5after solving we get 6p^2 -p -1=02p-1=0    and 3p+1=0p=1/2     and p=-1/3tan(x)/2=1/2    and tan(x)/2= -1/3
```
3 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies

## Other Related Questions on IIT JEE Entrance Exam

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

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

## Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details