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Q.19 see image..........................................................

Q.19 see image..........................................................

Question Image
Grade:12

1 Answers

Aditya Gupta
2081 Points
4 years ago
option is correct.
draw the figure, apply sine rule in ABD, pythagoras and elementary trigono in ACD, and finally cosine rule on angle ADB.
eliminate and find the final ans as 
2(c^2 – a^2)/3ca
kindly approve:)

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