How is ABCD a cyclic quadrilateral in Question 2 of exercise 10.5 of class 9 . It is not given
if rs 900 amounts to rs 1044 in 4 years, what sum will amount to 1368 in 3 1/2 at the same rate
If A,B,C are the interior angles of a triangle ABC then show that cosec2(b+c÷2)-tan2a÷2=1