Question

pake cara ............​

Answer 1

Verified answer

PEMBAHASAN

Dimensi Tiga

Kubus

r = 4 cm

O tengah HF

Perhatikan ∆BFO

siku di F

HF = r√2

FO = 1/2 HF = 1/2 r√2

BO = 1/2 r√6

Sudut antara BF dan bidang BEG adalah sudut FBO.

∠(BF , BEG) = ∠FBO = B

sin B = FO/BO

sin B = (1/2 r√2)/(1/2 r√6)

sin B = 1/√3

sin B = 1/3 √3

cos B = BF/BO

cos B = r/(1/2 r√6)

cos B = 1/3 √6

tan B = FO/BF

tan B = (1/2 r√2)/r

tan B = 1/2 √2