Solve the equation sin(xº - 20°) = cos(42") for x, where 0

x = 68°

Step-by-step explanation:

Using the cofunction identity

cos x° = sin(90 - x)°, then

cos42° = sin(90 - 42)° = sin48°

Given

sin(x - 20)° = cos42°, then

sin(x - 20)° = sin48°, thus

x - 20 = 48 ( add 20 to both sides )

x = 68

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.

me! what did you put for this question?

step-by-step explanation: