1.

Which of the following is true :

Answer»

`SIN '(pi)/(12)= (SQRT(3) - 1)/(2sqrt(2))`
`cos'(pi)/(12) = (sqrt(3) + 1)/(2sqrt(2))`
`tan 15^(@) = 2 - sqrt(3)`
`sin'(pi)/(10) = (sqrt(5) - 1)/(4)`

Answer :A


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