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Text Elements
cos( 3π/11 ) = sin ( 5π/22 )
(+,+)
(-,+)
(+,-)
(-,-)
θ
- Π/2
θ
Now you are going forwards 90 degrees
Angles and are in the same quadrant.
3Π/11
5Π/22
If and add up to 90, they are co-function valid
3Π/11
5Π/22
3Π/11
5Π/22
L.S
R.S
Π/2
6Π/22
5Π/22
11Π/22
Π/2
L.S = R.S !!!!!!
cos( π/2 - 5π/22 ) = sin ( 5π/22 )