×

#### Thank you for registering.

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

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
```
if cosA = K cos(A - 2B) then prove tan(A -B) = 1 - K/1 + K × cotB
if cosA = K cos(A - 2B) then prove tan(A -B) = 1 - K/1 + K × cotB

```
2 years ago

Arun
25768 Points
```							Dear student cos (A – 2B) / cos A = 1/k cos (A – 2B)  – cos A / cos (A – 2B) + cos A = 1 – k / 1+ k tan (A – B) * cot B = 1 – k / 1 + k Hence proved
```
2 years ago
Think You Can Provide A Better Answer ?

## 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