Question

(48 sin 16 * cos 16 * cos 32 ) / cos 26

Answer 1

$frac{48 sin16кcos16кcos32к}{cos26к} = frac{24sin32кcos32к}{cos 26к} = frac{12sin64к}{cos 26к}= frac{12sin(90к-26к)}{cos26}=$$=frac{12cos26к}{cos26к}=12$

P. S.

$sin2 alpha =2sin alpha cos alpha$