HSC Science (General) 12th Board ExamMaharashtra State Board
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# Solution - In Δ ABC, if a = 13, b = 14 and c = 15, then sin (A/2) - HSC Science (General) 12th Board Exam - Mathematics and Statistics

ConceptSolution of a Triangle

#### Question

In Δ ABC, if a = 13, b = 14 and c = 15, then sin (A/2)= _______.

(A) 1/5

(B) sqrt(1/5)

(C) 4/5

(D) 2/5

#### Solution

(B) sqrt(1/5)

s=(a+b+c)/2=(13+14+15)/2=21

sin(A/2)=sqrt(((s-b)(s-c))/(bc))=sqrt(((21-14)(21-15))/(14xx15))=sqrt(1/5)

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#### APPEARS IN

2016-2017 (March) (with solutions)
Question 1.1.3 | 2 marks
Solution for question: In Δ ABC, if a = 13, b = 14 and c = 15, then sin (A/2) concept: null - Solution of a Triangle. For the courses HSC Science (General) , HSC Science (Electronics), HSC Arts, HSC Science (Computer Science)
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