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Answered

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

Verified Answer :

sec Ф=1/cos Ф=cos⁻¹Ф

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

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