Question

What is the correct definition for sec theta ?
a.sec theta=cos^-1theta
b.sec theta=sin^-1theta
c.sec theta=1/sin theta
d.sec theta=1/cos theta
e.sec theta=1/tan theta

Answer 1

sec Ф=1/cos Ф=cos⁻¹Ф

correct answers: a. sec Ф=cos⁻¹Ф    and    d. sec Ф=1/ cos Ф