Question

Si se cumple que sen * 2x * sec(70 deg) = 1 , efectúe

M = csc^2 (3x) + 5 .

Answer 1

Respuesta:

9

Explicación paso a paso:

$sen(2x)sec70^o=1\\\\sen(2x)\times \frac{1}{cos70^o} =1\\\\sen(2x)=cos70^o\\\\2x+70^o=90^o\\\\2x=90^o-70^o\\\\2x=20^o\\\\x=10^o$

Hallamos "M":

$M=csc^2(3x)+5\\\\M=csc^2(3\times 20^o)+5\\\\M=csc^260^o+5\\\\M=2^2+5\\\\M=4+5\\\\M=9$