If 0 < z ≤ 90 and sin(9z − 1) = cos(6z + 1), what is the value of z?

z = 3
z = 4
z = 5
z = 6

z=6.  quick maths

Step-by-step explanation:

z = 6

Step-by-step explanation:

we know that

if  sin(A)=cos(B)

then

angle A and angle B are complementary angles

therefore

In this problem

sin(9z − 1) = cos(6z + 1)

then

(9z − 1)+(6z + 1)=90° > by complementary angles

Solve for z

15z=90

z=90/15=6

answer is:

1.75 pounds

( - 4 , -7 )

all the lines must parallel  

step-by-step explanation:

coordinates of c = ( - 1 , 2 )

3 units left = ( -4 , 2 )

9 units down = ( - 4 , 11 )