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
`        Cos X+CosY=1/3,SinX+SinY=1/4 then Sin (X+Y))=Please send andere for this question .This question is from trignomdtri`
one year ago

```							cosX + cosY = 1/3    2 cos(X+Y)/2 cos(X–Y)/2 = 1/3         ...(1)sinX + sinY  =  1/4    2 sin(X+Y)/2 cos(X–Y)/2 = 1/4         ...(2)Divide (2) by (1)[2 sin(X+Y)/2 cos(X–Y)/2] /[2 cos(X+Y)/2 cos(X–Y)/2] = (1/4)/(1/3)tan(X + Y)/2  =  3/4.We know that sin2x = 2 tanx / (1 + tan2x) sin(X + Y) = 2 tan(X + Y)/2 / (1 + tan2(X + Y)/2) = 2.(3/4) / (1 + 9/16)                   = (3/2)(25/16)      sin(X + Y) = 24/25.
```
one year ago
Think You Can Provide A Better Answer ?

## Other Related Questions on Vectors

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

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