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# 1. Let be an angle between and such that . Assume that . Then if the terminal point of , enter and in that

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1. Let $$\theta$$ be an angle between $$\pi$$ and $$\frac{3\pi}{2}$$ such that $$\cos(\theta) = -1/9$$. Assume that $$\cos(\theta/2) < 0$$. Then if the terminal point of $$\frac{\theta}{2} = (a_1, a_2)$$, enter $$a_1$$ and $$a_2$$ in that order.

2. Find the 3 smallest positive x-intercepts of the graph of $$y = \cos(12x) + \cos(14x)$$and list them in increasing order.

3. Calculate $$\arccos \sqrt{\cfrac{1+\sqrt{\cfrac{1-\sqrt{\cfrac{1-\sqrt{\cfrac{1+\cfrac{\sqrt{3}}{2}}{2}}}{2}}}{2}}}{2}}$$. As usual, the output of an inverse trig function should be in radians.

I could use a little help on these problems, thank you!!

Feb 19, 2020

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Anyone have a pointer or something? Thanks!

Feb 21, 2020
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Yes, I have a pointer.

1 post = 1 question.

Feb 23, 2020