Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
541 views
in Trigonometry by (53.1k points)

In a triangle ABC, if (1 + a/b + c/b)(1 + b/c - a/c) = 3, then the angle A is equal to

(a)  π/3

(b)  π/4

(C)  π/6

(D) None of these

1 Answer

+1 vote
by (53.3k points)
selected by
 
Best answer

Correct option (a)  π/3

Use cos A.

(b + a + c)(b + c – a) = 3bc

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

...