Help with Trigonometry?

[musicman]

been stuck on a couple problems.. help would be greatly appreciated.

express (sinθ+cos&#952/cos θ in terms of tan θ

express sec θ - sin θ tan θ in terms of cos θ

Express (cos2) x (secx) in terms of cos x

 

[Zerkerfist]

I feel your pain.... I am starting my trig unit tonight :sick:

 

[musicman]

I'm taking it online.. so there is little help

 

[Imagine]

#1 is tan() + 1
might do the others later. join sythe-irc.org for help

 

[musicman]

doing it, already got number 1 but thanks

 

[BumbleB3e]

What class is this for?

 

[Jimmy]

Just break everything up into sines/cosines and simplify.

csc(&#952 = 1/sin(&#952
sec(&#952 = 1/cos(&#952
tan(&#952 = sin(&#952/cos(&#952
cot(&#952 = cos(&#952/sin(&#952
sin^2(&#952 + cos^2(&#952 = 1

 

[Piramid]

Just break everything up into sines/cosines and simplify.

csc(&#952 = 1/sin(&#952
sec(&#952 = 1/cos(&#952
tan(&#952 = sin(&#952/cos(&#952
cot(&#952 = cos(&#952/sin(&#952
sin^2(&#952 + cos^2(&#952 = 1

also
sin^2(&#952-1=cos^2(&#952
cos^2(&#952-1=sin^2(&#952

 

[Sypherz]

There are some simple rules for all of these. 6 of them I believe? I suggest you memorize

 

[ezkNYNE]

I recently (yesterday) started trig. I was wondering which academic stream / grade level that problem stems from. I'm in Grade 10 Math, Academic (Highest stream possible, apart from University which comes into play Grade 11 w/ Advanced Functions).

 

[sellingraresboy]

Omg omg am i dreaming? I hate that! Good luck i hope that you will do better on the exams then me, 1 being the worst mark and 5 the max, i did 2, =( gl for you.

 

[Insidious Insinuations]

Post it here next time: Homework Help

I didn't try solving them, but knowing double angle formulas and expressing them all in cosines/sines will make it much easier.

 

[neo coolboy]

Dude I just started the trig section too, and it sucks. Are you from Florida by any chance?

 

[Herman Li]

Trig's easy. Just wait til Calc II. Fml

 

[Piramid]

I recently (yesterday) started trig. I was wondering which academic stream / grade level that problem stems from. I'm in Grade 10 Math, Academic (Highest stream possible, apart from University which comes into play Grade 11 w/ Advanced Functions).

same with me, I'm in grade 10 but I started trig in grade 9.