Question

Find the remaining trigonometric ratios
sec (phi)= −2.5, pi/2 13 years ago

Answer 1

there is an angle whose secant is \(\frac{5}{2}=2.5\)
ignoring the signs for a moment, find the third side by pythagoras
it is
\[\sqrt{5^2-2^2}=\sqrt{25-4}=\sqrt{21}\] then use the appropriate ratios, making sure to keep track of the signs you should have in quadrant 2

Answer 2

thank youu :)