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Choose the correct answer in each of the following questions:
If `(cos theta + sec theta) =(5)/(2) " then " (cos^(2)theta + sec^(2)theta)=?`
A. `(21)/(4)`
B. `(17)/(4)`
C. `(29)/(4)`
D. `(33)/(4)`

1 Answer

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Best answer
Correct Answer - B
`(cos theta+sec theta)^(2)=(25)/(4) rArrcos^(2)theta+sec^(2)theta+2=(25)/(4)rArr cos^(2)theta+sec^(2)theta=(25)/(4)-2=(17)/(4).`

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