Question

if sec theta = 3/2 then find the value of 2cos^2 theta + 2 cot^2 theta - 9​

Answer 1

Hi,

-Since, sec theta=3\2 ->cos theta=2\3

-Suppose in triangle abc , <a=theta

-AC=hypotenuse=3, AB=2

-therefore by pytho AB=root 5