1.

If cos A = tan B, cos B = tan C and cos C = tan Athen show thatsin A = sin B = sin C = 2sin 18^circ.

Answer»

`(SQRT(5)-1)/(4)`
`(sqrt(5)-1)/(2)`
`(sqrt(3)-1)/(4)`
`(sqrt(3)-1)/(2)`

ANSWER :A::B


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