Doubt from integration

definite-integration
sm
trigonometry
moderate
unsolved
#1

Question no 56 and 57

#2

57
Put a+b-x (1-x)
Then write e wala part in reciprocal
Multiply denominator by e wala part
Then and and 1st and last eqn

#3

#4

#5

#6

#7

Question no 14 I did but got wrong answer the answer is 1 but I got in fraction uploading my solution too correct me where I am wrong

#8

How -98 in answer is beyond understanding...your answer is correct so far i understand calculus...what is the source of question...is there any answer with explanation...if yes pls upload

#9

-98 nahi hai -9B hai

#10

Ok let me try

#11

-9A=-1/9 so A=1/81 -9B=-1/9 so B=1/81

#12

But answer says A is one and it's a numerical based question I think the rhs should be -1/9A and -1/9B then all is clear then our solution too satisfies the question

#13

Yes your answer is correct..RHS of question is not correct...