Question

sin 105° + cos 105º = cos 450°​

Answer 1

sin(105°)+ cos (105°)=cos 450°

sin (105°)+ cos(90+15°)=0

sin(105°)-sin (15°)=0

transform the expression

2cos (60°)sin (45°)=0

2×1/2 × _/`2/2=0

_/`2/2=0

0.707107=0

RHS#LHS

FALSE