Find the value of R that will make the equation sin 73º = cos R true when 0° < R < 90°. Explain your answer.

The sine of an angle is equal to the cosine of the complementary angle.

That is; sin r = cos 90 -r , where r is an acute angle

Therefore;

sin 73 = cos (90-73)

sin 73 = cos 17

Hence the value of r = 17

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.

-4

step-by-step explanation:

do 6-10=

if u need it to be negative.