Which of the following statements is impossible?

a)8cos theta= -8
b) 4tan theta=125
c) 100sec theta=99
d)12cot theta=1

2. i think its (c).
-1<=cos(theta)<=1

3. Originally Posted by ceroseven

Which of the following statements is impossible?

a)8cos theta= -8
b) 4tan theta=125
c) 100sec theta=99
d)12cot theta=1
What's the range for the secant function?

4. (-1,1)??

5. Originally Posted by ceroseven
(-1,1)??
No, $\left[-1,1\right]$ is the range for cosine. If you can find the 'complement' of that interval, you will have the range of secant.

6. So what is the answer? I am confused

7. Originally Posted by ceroseven
So what is the answer? I am confused
Do you even know the definition of sec theta?