Thank you for registering.

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

Please check your email for login details.
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 a + cos b – cos (a+b) = 3/2 show that a=b= 60 degrees

cos a + cos b – cos (a+b) = 3/2 show that a=b= 60 degrees

Grade:11

1 Answers

Ahsan Barkati
18 Points
6 years ago
Let A+B+C=180
 cosA+cosB+cosC = cos A+ cos B +cos A+B
cosA+cos B- cosC= cos A+ cos B -cos A+B
                            3/2= 1-4sinA/2 sin B/2 cosC/2
4sinA/2 sin B/2 cosA+B/2=--1/2
A=b=60
                           

 

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free