Double angle formula question (1 Viewer)

[yellowhighlighterr]

So I need help with 7a. I've managed to do all of 6, but can't seem to apply it to 7. Any help will be much appreciated!

 

[yellowhighlighterr]

aaaaaah ok. Thanks m8. Could u also help me out w/ this one:

 

[synthesisFR]

ill add the explanation

 

[synthesisFR]

aaaaaah ok. Thanks m8. Could u also help me out w/ this one:



View attachment 38909

try exactly what i did above here and see if u can figure it out
if not lmk where ur stuck

 

[synthesisFR]

look the process is always the same

 

[itskratika_07]

look the process is always the sameView attachment 38911

lol I saw your message right after I did it myself
But thanks so much dude