Question

If
$\frac{ \ { \tan }^{3}x - 1}{ \tan \: x - 1 } = a \ {sec}^{2} x + b \tan \: x$
then
$a + b =$
a) 1
b) -1
c) 2
d) 3​

Answer 1

Answer:

1Q. Sumitra paid Ru. 170 for 4 mangoes and 5 oranges . Rita paid Ru. 200 for 6 mangoes and 2 oranges. find the cost of one mango and one orange.

2Q. divide Ru. 10000 into two part such that 40% of the one part is is greater than the 50% of the other part by Ru. 400.

CLUE: these both are simultaneous linear equations.