Describe how you would convince a friend that sin(x + y) does not equal sin x + sin y.

In order to convince a friend that  sin(x + y) does not equal sin x + sin y, we can assume a value for the angle "x and "y"

Let;

Substitute the given values into sin(x+y) and sinx + siny

sin(x+y) = sin(30+30) = sin60

sin 60 = 0.8660

For sinx + siny

sin x + sin y = sin 30 + 30

sinx  + sin y = 0.5 + 0.5 = 1

Since 0.8660 ≠ 1.0, hence sin(x + y) does not equal sin x + sin y.

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the answer is ! ?

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -