If you look at the circle. The two ones that look most like rs is the 64's. Therefore using logic you can just add 64 plus 64 to get 128. Hope it helps.

5 0

3 years ago

Use the unit circle to find sec (-90)

andreyandreev [35.5K]

Using the unit circle, you can visualise the secant as follows:

Draw the vertical line passing trough (1,0)
Extend the radius until it meets this line at point P
The length of OP is the secant of your angle.

Since -90 means that the radius points downwards, it means that the radius is vertical as well, and thus it never meets the vertical line through (1,0).

Thus, the secant is not defined at -90.

In fact, if we switch back to the function notation, we can confirm this claim, since we have

$\sec(x)=\dfrac{1}{\cos(x)}\implies \sec(-90)=\dfrac{1}{\cos(-90)}=\dfrac{1}{0}$

which is undefined.

4 0

3 years ago

Solve 2x²-x+3 in bull dover

liq [111]

Answer:

2x2 - x + 3

Step-by-step explanation:

8 0

3 years ago