Mathematics - 4 November 2007

plz..help

2007-11-04 01:14:46 · 3 answers · asked by Anonymous

1.3 sin x- 2 sin x + sin x is equal to
a.o
b.2 sin x
c.-2 sin x
d.sin x

2.the sum of 5 cos x -tan x and 5 tan x - cos x is

a.6 cos x- 6 tan x
b.4 cos x - 4 tan x
c.cos x -13
d.4 cos x +13

3.when we subtract 2 cos x +5 from 3 cos x -8,the result is
a. cos x-3
b.-cos x -3
c.cosx -13
d.5 cos x + 13

4.when simplified,the expression
3 sin x + 5 sin x (cos x-sin x) is equal to
a.3 sin x + 5sin x cos x - 5 sin ^2 x
b.8 sin x cos x-8 sin^2 x
c.3 sin x + 5 sin x cos x - sin x
d.8 sin x - cos xsin x

5.the expression of sin^@ x-1 divided by sin x + 1 is equal to

a. sin x
b.sin x-1
c.1
d.sin x +1


you have to show youre solution

honestly speaking its really hard and i really need help and if you answered that i highly appreciated

2007-11-04 00:54:41 · 5 answers · asked by ironfist09 2