7√2*sin15П/8cos15П/8=

Question

7√2*sin15П/8cos15П/8=

Answer 1

= 7/2 * sgrt2 *2sin15pi/8cos15pi/8= 7/2 *sgrt2*sin15/4=7/2*sgrt2*sin(-pi/4)=
=7/2*sgrt2*(-sgrt2/2)= -7/2= - 3,5

Comments

Спасибо огромное тебе))дай бог тебе здоровья!)