Question

Find x giving your answer to 1 decimal place

Answer 1

x is 10.8 cm

Explanation:

from Lami's theorem:

`(7)/( \sin(40 \degree) ) = (x)/( \sin(81 \degree) ) \\ \\ x = (7 \sin(81 \degree) )/( \sin(40 \degree) ) \\ \\ x = 10.8 \: cm`

Answer 2

Explanation:

`( \sin(81) )/(x) = ( \sin(40) )/(7) \\ x * \sin(40) = 7 * \sin(81) \\ x = (7 * \sin(81) )/( \sin(40) ) = 10.75 = 10.8 \: cm`