Prove these identities: a) (sec x+cosec x)² tan x = (tan x + 1)² (tan x + cot x)

b)1+ tan²Alpha cosec²Beta/1+ tan²Alpha cosec² theta = 1+ sin²Alpha cot²Beta/1+ sin²Alpha cot²theta

c) 1+ 3 cos a - 4 cos³a/1- cos a = (1 + 2cosa)²

d) 1+ cosy - 2cos²y/sin²y = 1+ cosy/1+ cosy

e) 1- sin²A/1+ cosA + 1+ cosA/sinA - sinA/1- cosA = cot²A(1- cosA)

62.5 paisa

step-by-step explanation:

4000*70 = 280000

280000-(2000*90) = 100000

4000-2400 = 1600

100000/1600 = 62.5

( give brainliest)

the volume is the product of the area of the base, 3x(3x+4), and the height, 3x-1

step-by-step explanation:

the ratio of balloons to tables is 5: 2 and the constant variation is 5.

the equation is y=5x

3

step-by-step explanation:

divide 13.5 by 9 to get the scale factor. it equals 1.5

2 * 1.5 = 3