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1)if the median of triangle ABC through A is perpendicular to AB, then value of tanA + 2 tanB is......?
2)In a triangle ABC, a=5,b=4 & cos(A-B)=31/32, then side c=.....?
3)if the bisector of angle A of ΔABC makes an angle Φ wid BC, then sinΦ is equal to....?
4)in a triangle ABC, (a+b+c)(b+c-a)=Λbc if......(condition)?
Dear nishat
In Triangle ACD
use sine rule
a/2 sinB /sin(180-A-B) = a/2 /sin(A-90)
sinB/sin(A+B) = -1/cosA
sinB cosA = -sin(A+B)
sinBcosA =-[sinAcosB + cosA sinB]
tanA +2tanB =0
post seperate question in different post
Please feel free to post as many doubts on our discussion forum as you can.If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly. We are all IITians and here to help you in your IIT JEE preparation.All the best. Regards,Askiitians ExpertsBadiuddin
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