Identities reviewing.

[dave199]

theta=(T) degrees=(D)
1)prove:tan(T)-cot(T)/tan(T)+cot(T)=2sin^2(T) - 1
2)prove:1-cos(T)/sin(T)=sin(T)/1+cos(T)
3)prove:1-tan^2(T)/1+tan^2(T)=1 - 2sin^2(T)

the answers for these 3 are in the question im really having troubles with proving.

theta=(T) pie=(P) beta=(B)

1) simplify: (3(P)/2+(T))
2)if tan x = 2 find tan((P)/4+x)
3)if tan(T)= -12/5 and (T) lies in quadrant 2, then what is the value of cos2(T)
4)if cos(B)= -1/3 and (B)is a second quadrant angle find the tan2(B)
5)if sin A= -3/5 in quadrant 3, find cos2A

HERE ARE THE ANSWERS I JUST NEED THE WORK:
1)-cos(T)
2)-3
3)-110/169
4)4root2/7
5)7/25

 

[galactus]

theta=(T) pie=(P) beta=(B)

Is this a math question or a baking question?.

Come on!......... :roll:

 

[stapel]

im really having troubles with proving.

What have you tried? How far have you gotten? Where are you stuck?

I JUST NEED THE WORK:

We already know how to do these, and you already have worked examples in your textbook and in your class notes. Our doing the work for you is unlikely then to be helpful for your learning.

So please reply with your thoughts, efforts, and steps so far. Thank you!

Eliz.