Question

sin 30 degree by cos 45 degree + cos 45 degree by sec 60 degree minus sin 60 degree by tan 45 degree + cos 30 degree by sin 90 degree

Answer 1

you know that sin 30 by cos 45 equals to half by one by root 2 + cos 45 by 660 goes to one by root 2 by 2 minus sin 60 by tan 45 degree equals to root 3 by 2 by 1 and + cos 30 by sin 90 degree equals to root 3 by 2 by one that means that answers one by root 2 + 1 by 2 root 2