Sek 30 ° = x / 12?

Odgovor:

# x = 8sqrt3 #

Pojasnilo:

#Sec 30 ° = x / 12 #

# 1 / (cos30 ^ @) = x / 12 #

z uporabo "kroga enot" lahko določimo natančno vrednost # cos30 ^ @ = sqrt3 / 2 #

# 1 / (sqrt3 / 2) = x / 12 #

# 2 / (sqrt3) = x / 12 #

navzkrižno množi:

# 2 * 12 = xsqrt3 #

# 24 = xsqrt3 #

# x = 24 / sqrt3 #

racionalizirati imenovalec:

# x = (24sqrt3) / 3 #

# x = 8sqrt3 #

Odgovor:

Spodaj

Pojasnilo:

# sec30 = x / 12 #

to vemo # cos 30 = sqrt3 / 2 #

prav tako #sec = 1 / cos #

zato #sec 30 = 2 / sqrt3 #

ATQ, # 2 / sqrt3 = x / 12 #

# 24 = sqrt3x #

# x = 8sqrt3 #

HOPE U GET!

~ CHEERS !!