Prove that `sec^(2)theta+cos^(2)theta` can never be less than 2.

Prove that cos^(2)theta + sec^(2)theta can never be less than 2 for all values of theta in R-(2n+1)(pi)/(2) , n in I .

Consider the following statements : 1. "cos"theta+"sec"theta can never be equal to 1.5. 2. "sec"^(2)theta+"cosec"^(2)theta can never be less than 4. Which of the statements given above is/are correct ?

Prove that : (i) sec theta+cos theta can never be equal to (3)/(2) (ii) cosec^(2)theta+"sin"^(2) theta can never be less than 2.

(i) Is the equation 2 cos^(2)theta + cos theta -6 =0 possible ? (ii) Is the equation 2 "sin"^(2)theta-costheta +4=0 can never be less than 2.

Prove that : sec theta + cos theta != 3/2

Consider the following sttements: 1. cos theta + sec theta can never be equal to 1.5 2. tan theta + cot theta can never be less than 2

Prove that sec^(2) theta + "cosec"^(2) theta = sec^(2) theta "cosec"^(2) theta

Prove that sec^(2) theta + cosec^(2) theta = sec^(2) theta * cosec^(2) theta

Prove that : sec^(2)theta - cos^(2) theta = sin^(2)theta(sec^(2)theta + 1)

if y=cos^(2)theta+sec^(2)theta then