Use a calculator to find ,to four significant digits , approx. values of the other five trigonometric functions of theta:
a)cos theta=0.7816 and theta is in the first quadrant
How to do this question...
thank you
Use a calculator to find ,to four significant digits , approx. values of the other five trigonometric functions of theta:
a)cos theta=0.7816 and theta is in the first quadrant
How to do this question...
thank you
Hello mj,
I showed you how to do this in the other post you neglected.
$\displaystyle \cos \theta=0.7816$
$\displaystyle \cos \theta = \frac{x}{r}=\frac{0.7816}{1}$
$\displaystyle \sec \theta = \frac{1}{0.7816}\approx 1.279$
Thus,$\displaystyle \boxed{r = 1}$ and $\displaystyle \boxed{x \approx 0.7816}$
Now find y.
$\displaystyle r^2=x^2+y^2$
$\displaystyle 1=(0.7816)^2+y^2$
$\displaystyle \boxed{y\approx 0.6238}$
Now you have x, y, and r. Go back to your other post and see the appropriate ratios so you can substitute these values in to find sin, tan, csc, and cot.