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Choose the correct answer in each of the following questions:
`3cos^(2)60^(@)+2cot^(2)30^(@)-5sin^(2)45^(@)=?`
A. `(13)/(6)`
B. `(17)/(4)`
C. 1
D. 4

1 Answer

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Best answer
Correct Answer - B
`3cos^(2)60^(@)+2cot^(2)30^(@)-5sin^(2)45^(@)`
`=3xx((1)/(2))^(2)+2xx(sqrt(3))^(2)-5xx((1)/(sqrt(2)))^(2)=(3)/(4)+6-(5)/(2)=(17)/(4).`

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