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(log)(t1)(4sin9^0cos9^0)w h e r e\ t1=4s...

`(log)_(t_1)(4sin9^0cos9^0)w h e r e\ t_1=4sin 63^0cos 63^0\ e q u a l s`
a.`(sqrt(5)+1)/4` b. `(sqrt(5)-1)/4` c.`1` d. none of these

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