Use the substitution method exclusively for Q5 please

Question 5 | 24 points Use substitution to solve each of the following equations on the stated domain algebraically. If a definite domain is not provided, make sure to state the general solution. When showmg the substitution, be sure to clearly give a "let statement\" to show the substitution and to transform the domain for the substituted variable as well. -_0L 1 _ A. 4sm[2- ijZ Tr e B. secz(? g) = 2 on [0, 2n) C. sin(2x) +sin(4x) = O on (TT/2,TT) Hint: let6=2x Question 6 | 8 points it Establish each identity below. Make sure to use the method displayed in class, inciuding stating the reasons for each step of your simplifying. A. ten 9 cote c0529 = sin2 9 sec or + sin a csc a cos a B. = 2tan Ct