FatimaA
your question is not clear....are you trying to solve the trigonometric equations cosθ =1/3 and sina = 4/5....please explain.
Hi, I'm having trouble with this problem. I'm supposed to find the trig functions. If I can have some help on part a I think I can do the rest on my own.
1. Suppose that cosθ =−1/3, where π <θ < 3π/2.
Find and simplify the following. Draw a picture to help explain your answer.
a) tanθ
I was able to draw a picture and determine that the point lies in quadrant 3. Do I need to use a pythagorean equation to find sinθ and then use that to find tanθ?
Fatima A
Please use correct language for mathematics...you are trying to solve a trigonometric equation...not a function!!!
anyway cosθ = -1/3 has a solution θ = 109.5 degrees..use a scientific calculator it is easy.... don't forget to limit your solutions only into the interval given .