(sin2A+sin2B+sin2C)/(sinA+sinB+sinC)i se...

`(sin2A+sin2B+sin2C)/(sinA+sinB+sinC)i se q u a lto` `8sin(A/2)sin(B/2)sin(C/2)` (b) `8cos(A/2)cos(B/2)cos(C/2)` `8tan(A/2)tan(B/2)tan(C/2)` (d) `8cot(A/2B)/2cot(C/2)`

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