Video solving this by different angle formula:
   • Different Angle Formula (sin cos): MI...  

Some practice problems:
https://owlsmath.neocities.org/Differ...
https://owlsmath.neocities.org/Differ...

Trig cheat sheet:
https://owlsmath.neocities.org/Trig%2...

Website:
https://owlsmath.neocities.org

Check out my other channel OWLS MATH!
   / @owlsmath  

Check out my other channel OWLS SCHOOL OF MATH!
   / @owlsschoolofmath9732