Question

prove that
sin 70° - cos 40°/
cos 50° -sin 20°=
1/root 3​

Answer 1

Answer:

we know that tan 0-cot 0÷1

cot 80.tan 80=1

cot 70.tan 70=1

sin 40+sin50+tan 60

we know that:sin=cos +(90-0)

sin 40=cos (90-40)=cos 50

cos 50 + sin 50 +sin50+tan 60

=1+tan 60

since sin 50+cos 50+tan 60

we know that tan 60 √3

1+√3