Please... I really need to do this...
а) sin(2х + 3) = а + 4
б) 2cos(х + π/3) = а2 - 3а
в) tg22х - (2а +1)tg2х + а(а + 1) = 0.

\sin (2x)-\sin (x)-2\cos (x)+1=0 I did the best I could hope this helps

Step-by-step explanation:

answer: a

step-by-step explanation: the answer is a due to the rule of symmetry; that a line of symmetry must divide a figure into 2 pieces that are the exact same, only reflected over a line of symmetry. b and c do not have lines of symmetry and would not divide the figure evenly, thus making the answer a.

the answer is  

a.

28 ft2

step-by-step explanation: