16-03-2014
Mathematics

Answered

what is the cosine of 135 degrees?

Answer :

Аноним Аноним

16-03-2014

[tex]cos135^o=cos(90^o+45^o)=-sin45^o=-\frac{\sqrt2}{2}\\\\reduction\ formulas:\ cos(90^o+\alpha)=-sin\alpha[/tex]

Answer Link

kate200468 kate200468

17-03-2014

[tex]cos(180^0- \alpha )=-cos \alpha \\ \\ cos135^0=cos(180^0-45^0)=-cos45^0=- \frac{ \sqrt{2} }{2} [/tex]

Answer Link

Other Questions

What group gained some support because of the terrible conditions a prohibitionists b Wall Street brokers c the Socialist Party d gangsters

What is the solution to the equation 4x263x1620

is the broad concept that refers to the right and ability of a nation to govern itself and make decisions regarding its citizens Select the best answer choice

What percent of 90 is 50

Last week Rohana bought a new computer for 10 off the advertised price The advertised price was 1800 How much did Rohana have to pay for the computer

Darrin put the numbers 725 752 572 and 527 in order from the greatest to the least Is his work correct Explain

Help Given that WZYZ VZXZ select the postulate theorem that you can use to conclude that the triangles are similar

Please solve by factoring 5x27x660use a comma to seperate answers

WHAT IS 1234565678901423 THAT MEANS TO DIVIED PLEASE TELL ME THE ANSWER

Neela is making rectangular place mats that are 13 inches wide and 16 inches long What is the least amount of ribbon that she will need to create a ribbon borde