In quadrant 4, if tan0 = -7, find sin0

Restrictions on f(x) = 1/x+5 and g(x) = x-2

Svetlana's hair is 4 4 centimeters ( cm cm) long. her hair grows 1 . 5 cm 1.5cm per month. svetlana wants her hair to be less than 1 6 cm 16cm long. write an inequality to determine the number of months, m m, svetlana can allow her hair to grow so that it is less than 1 6 cm 16cm long.

Anyone know? will mark brainliest if correct