SacredCultivator Posted April 24, 2006 Share Posted April 24, 2006 Dear Readers, I have procrastinated my Trig HW and I did what I knew but there are a few problems that I am stumped on and the Book does not do a great job on explaining it... So I shall see if you guys/girls can help me out.Directions: Solve each equation on the interval 0 is less than or equal to theta(Symbol) < 2Pie.11. 2Sin(squared)Theta - 1 = 013. Sin(3Theta) = -117. Sec 3Theta/2 = -223. 4Sec(Theta) + 6 = -2-I got this down to: Sec(Theta) = -225. 3(Root 2)Cos(Theta) + 2 = -1-I got this down to: Cos(Theta) = -3/ 3(Root2)27. Cos(2(Theta) - Pie/2) = -129. Tan((Theta)/2 + Pie/3) = 1I am sorry to put this onto you to help but yeah I just do not understand these problems but I got all the others...If you are able to provide assistance I would appreciate like a tutorial on it to help myself... Thank you in advance. Link to comment Share on other sites More sharing options...

dMog Posted April 24, 2006 Share Posted April 24, 2006 Dear Readers, I have procrastinated my Trig HW and I did what I knew but there are a few problems that I am stumped on and the Book does not do a great job on explaining it... So I shall see if you guys/girls can help me out.Directions: Solve each equation on the interval 0 is less than or equal to theta(Symbol) < 2Pie.11. 2Sin(squared)Theta - 1 = 013. Sin(3Theta) = -117. Sec 3Theta/2 = -223. 4Sec(Theta) + 6 = -2-I got this down to: Sec(Theta) = -225. 3(Root 2)Cos(Theta) + 2 = -1-I got this down to: Cos(Theta) = -3/ 3(Root2)27. Cos(2(Theta) - Pie/2) = -129. Tan((Theta)/2 + Pie/3) = 1I am sorry to put this onto you to help but yeah I just do not understand these problems but I got all the others...If you are able to provide assistance I would appreciate like a tutorial on it to help myself... Thank you in advance.ummm......just looking at the header made my brain hurt.... brain exploded when i saw equation :( .....so some one tell when this place became the homework nanny Link to comment Share on other sites More sharing options...

Administrator Lite Posted April 24, 2006 Administrator Share Posted April 24, 2006 Too busy to answer them but will tell you a few things. You'll need to use some identities to solve some of them. (for example the sin^2x and and cos2x). The sec one should be easy. Secx is 1/cosx. Which implies the cosx is -0.5. Then solve as per usual...What method you using? CAST? Link to comment Share on other sites More sharing options...

SacredCultivator Posted April 24, 2006 Author Share Posted April 24, 2006 Hmmm this place never turned into the Homework place because no one asks :rolleyes: lol so I did.@Lite: Yeah I know it has to do with those identities and I applied the ones I know and the method, I am not sure what CAST is... So I am not even sure which method my Teacher is teaching =X Link to comment Share on other sites More sharing options...

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