- #1
lastochka
- 29
- 0
Hello,
I am trying to solve this. This material is not covered in my class, but I still want to know how to do it.
If cos(t)=$\frac{-9}{10}$ where $\pi$ <t<$\frac{3\pi}{2}$ find the values of
cos(2t)=
sin(2t)=
cos($\frac{t}{2}$)=
sin($\frac{t}{2}$)=
Give exact answers, do not use decimal numbers. The answer should be a fraction or an arithmetic expression.
I have no idea how to even start with it. I will appreciate your help!
I am trying to solve this. This material is not covered in my class, but I still want to know how to do it.
If cos(t)=$\frac{-9}{10}$ where $\pi$ <t<$\frac{3\pi}{2}$ find the values of
cos(2t)=
sin(2t)=
cos($\frac{t}{2}$)=
sin($\frac{t}{2}$)=
Give exact answers, do not use decimal numbers. The answer should be a fraction or an arithmetic expression.
I have no idea how to even start with it. I will appreciate your help!