Trigonometric Equations Question 302

Question: In a triangle $ ABC $ , sin $ A:\sin B $ : $ \sin C=1:2:3 $ . If $ b=4 $ cm, the perimeter of the triangle is

[MP PET 1986]

Options:

A) $ 6cm $

B) $ 24cm $

C) $ 12cm $

D) $ 8cm $

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Answer:

Correct Answer: C

Solution:

  • $ b=4cm\Rightarrow a=1\times 2,c=3\times 2 $ Hence perimeter $ =2+4+6=12 $ cm.