SOLUTION: Find the exact value without calculator:
(4cos30degrees - 6sin120degrees)^-2
Algebra.Com
Question 1090397: Find the exact value without calculator:
(4cos30degrees - 6sin120degrees)^-2
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
cos 30 is sqrt(3)/2
sin 120 is also sqrt (3)/2
(4sqrt(3)/2)-6 sqrt(3)/2)=-2 sqrt(3)/2
=-sqrt(3)
[-sqrt(3)]^(-2)=1/[-sqrt(3)]^2)=1/3
RELATED QUESTIONS
Find the exact value without a calculator:... (answered by lwsshak3)
74. find the exact value of the log. without using a calculator. log4 2+ log4... (answered by stanbon,ankor@dixie-net.com)
Find the exact value of the expression without a calculator.
{{{sin^2(40 degrees) +... (answered by greenestamps)
Find the exact value of the following expression without using a calculator.... (answered by nshah11)
Find the exact value of the following, without using a calculator.
sin(sin^-1... (answered by ikleyn)
how do i find the exact value of 8cos(pi/6)-sin(3pi/2) without a... (answered by Edwin McCravy)
find the exact value of cos 105degrees. without the table or... (answered by stanbon)
find the exact value of the logarithm without using a calculator:
log3... (answered by htmentor)
find the exact value of the logarithm without using a calculator... (answered by Alan3354)