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If L = sin^2 ((pi)/(16)) - sin^2 ( pi/...

If ` L = sin^2 ((pi)/(16)) - sin^2 ( pi/8) ` and
`M = cos^2 ( (pi)/(16)) - sin^2 (pi/8),` then :

A

`L = - (1)/(2 sqrt2) + 1/2 cos (pi/8)`

B

`L = (1)/(4 sqrt2) - 1/4 cos (pi/8)`

C

`M = (1)/(4 sqrt2) + 1/4 cos (pi/8)`

D

`M = (1)/(2sqrt2) + 1/2 cos (pi/8)`

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