chinnu

the length of the diagonals of a rhombus are 24cm and 32cm. the perimeter of the rhombus is (A) 9cm (B) 128cm (C) 80cm (D) 56cm plz do explain how to find. thank you

if theta = 45, the value of cosec ^ 2 theta is ?

sin (60 degrees + theta)-cos(30 degrees - theta)is equal to (A)2 cos theta (B)2 sin theta (C)theta (D)1 could u plz explain this answer thank you

find the mode of the fdllowing data class - 0-20 20-40 40-60 60-80 frequency -15 6 18 10 plz explain this sum thank you

if sin A + sin^2 A = 1, then the value of cos^A + cos^4 A is (A) 2 (B) 1 (C) -2 (D) 0

The average speed of an express train is 20km/hour more than the average speed of a passenger train .To cover a distance of 360kms the express train takes 3 hours less than that of the passenger train. Find the average speed of both passenger and express...