0

Guest

Courses New

In a triangle if a = 8,b=10,c=12 and C=lambda A find the value of lambda.

In a triangle if a = 8,b=10,c=12 and C=lambda A find the value of lambda.

Grade:11

1 Answers

Arun
25750 Points
5 years ago
use the law of cosines: 
c^2 = a^2 + b^2 - 2ab cos C 
cos C = [(144 - 64 - 100)/(- 160)] = 1/8 = 0.125 
arccos (0.125) = C 
Similarly if you find
Hence
Angle is c is twice of angle A
Hence lambda = 2

Think You Can Provide A Better Answer ?

Other Related Questions on Trigonometry

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More