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

if in a triangle ABC angle B = 120° then cosA + cosC lie in?

if in a triangle ABC angle B = 120° then cosA + cosC lie in?

Grade:11

1 Answers

Khimraj
3007 Points
4 years ago
As A+ C = 60°. So cosA +cosB = cosA + cos(60°-A) so find its max and Min value by Maxima and minima as there is lot of problem in typing these steps. And u get is value in range [3/2,√3].Hope it clears. If still u have doubts then please clarify. If u like answer then please approve the answer.

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