If f(1)=7and f(n)=f(n-1)-4 then find the value of f(4)

f(4) = - 5

Step-by-step explanation:

Using the recursive formula and f(1) = 7, then

f(2) = f(1) - 4 = 7 - 4 = 3

f(3) = f(2) - 4 = 3 - 4 = - 1

f(4) = f(3) - 4 = - 1 - 4 = - 5

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47

no solution

step-by-step explanation:

there is not enough information in the problem to solve.