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nishant kumar agarwal Grade: Upto college level
```        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)?```
7 years ago

147 Points
```										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
```
7 years ago
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