Question

How 1-tan²30° divide by1+tan²30° =cos60°

Answer 1

1-1/√3×1/√3÷1+1/√3×1/√3
=1-1/3÷1+1/3
=2/3÷4/3
=1/2
=Cos60°

Answer 2

heya friends ⬆

from lhs ....
➡1-tan^2 30°
----------------------
1+tan^2 30°

=>1-[1/√3]^2
-----------------
1+[1/√3]^2

=>1-1/3
-----------
1+1/3

=>3-1/3
-----------
3+1/3

=>2/3.
----------
4/3

=>1/2 ..lhs ....here.........

again from Rhs ........

cos60°. =1/2......

here we saw ..lhs =Rhs .....so here prooved .......


@,rajukumar☺☺☺1

hope it help ........thanks ..