In a triangle if a = 8,b=10,c=12 and C=lambda A find the value of lambda.
Amaan Hussain Barbhuyan , 7 Years ago
Grade 11
Trigonometry> In a triangle if a = 8,b=10,c=12 and C=la...
1 Answers
Arun
Last Activity: 7 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
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
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