True or false:
sinxcosy = 1/2 (sin(x+y) + cos(x-y))

False

Step-by-step explanation:

We simplify the right hand side of the expression to check if its equal to the left hand side of the expression or not.

Use the formulas:

sin (x+ y) = sinxcosy +cosxsiny

cos (x-y)= cosxcosy +sinxsiny

Thus, the expression will become

We cannot simplify this expression further.

We can see that the expression is not equal to the left hand side of the expression.

Hence, the statement is False.

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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