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 ,tanA.tanB=2, Then find the value of cosA.cosB/cosC

If in a triangle ,tanA.tanB=2,
Then find the value of cosA.cosB/cosC

Grade:11

1 Answers

Arun
25763 Points
3 years ago
you can write-
sinA sinB= 2 cosA cosB
now sinA sinB –cosA cosB= cosA cosB
thus cos (A+B)= cosA cosB
now in a triangle, A+B= \pi–C
thus cos(\pi–C) = cosA cosB
so cosA*cosB/cosC= – 1

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