$sin \ \theta = \frac{a}{h}$

$a \ = \ hsin \ \theta$

$cos \ \theta \ = \ \frac{b}{h}$

$b \ = \ h \ cos \ \theta$

$\sum M_o \ = \ 0 \curvearrowright$ +

$M_g \ (hsin \ \theta) \ – \ Fc . \ (h cos \ …