Question

Prove that: Cot 22.5 degree - Tan 22.5 degree = 2

Answer 1

Answer:

cot 22.5 degree - tan 22.5 degree = 2

since , cos 22.5 / sin 22.5 - sin 22.5 / cos 22.5

= cos square 22.5 - sin square 22.5 / sin 22.5 . cos 22.5

= 1 / sin 22.5 . cos 22.5

only half I know

hope its helpfull

Answer 2

Answer:

=2

Step-by-step explanation:

cot π/8=√2+1

tan π/8=√2-1

cot π/8-tan π/8 = √2+1-(√2-1)

√2+1-√2+1. (√2-√2=0)

1 + 1

2

L.H.S = R. H. S