100 Ideas that Changed Architecture

100 Ideas that Changed Architecture

Matematika Q. ( +50 )


1. Hasil dari 4 log 8 + 4 log 32 adalah....

2. Jika sin 23=m, maka cos 113= . . . .​

Q. ( +50 )


1. Hasil dari 4 log 8 + 4 log 32 adalah....

2. Jika sin 23=m, maka cos 113= . . . .​

Nomor 1:

⁴log 8 + ⁴log 32 = ⁴log (8 × 32)

= ⁴log 256

⁴log 256 = ⁴log 4⁴

= 4 . ⁴log 4

= 4 . 1

= 4

Nomor 2:

sin 23° = m

cos 113° = cos (90° + 23°)

cos 113° = cos 90° . cos 23° - sin 90° . sin 23°

cos 113° = 0 . cos 23° - 1 . sin 23°

cos 113° = - sin 23°

cos 113° = 1 - m

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