Given seccant of thata = 3, use trigonometric identities to find the exact value of
a Cos thata
b tan squre of thata
c csc (90 degree  thata)
d sin squre thata
secTheta=3
but secTheta= 1/cosTheta
solve for cosTheta
Then, sin^2theta+ cos^2Theta=1
solve for sinTheta.
then, Tan theta= sinTheta/cosTheta
you have it.
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