(1+y2)dx+2xy-dx=o solve
Question
prove that tan^-1(2ab/a^2 -b^2) +tan^-1( 2xy/x^2 - y^2) =tan^-1(2pq/p^2 - q^2)
find decimal expression
Maths
March 30, 2018, 11:25 p.m.
Answer
A well of diameter 3cm is dug 21m deep. The earth taken out of it has been spreaded evenly all around it to a width of 4m to form an embankment.find its height
A train travels at a certain average speed for a distance of 63 km and then Travels at a distance of 72 km at an average speed of 6 km per hour more than its original speed takes which takes 3 hours to complete total journey whats a what is the original average speed
I do not understand these steps please briefly explain and solve this
Maths
March 30, 2018, 2:40 p.m.
Answer
If A=[cos alpha -sin alpha
sin alpha cos alpha] and A^-1=A^T find the value of alpha
sin alpha cos alpha] and A^-1=A^T find the value of alpha