Choose the correct answer in each of the following questions:
`3cos^(2)60^(@)+2cot^(2)30^(@)-5sin^(2)45^(@)=?`

Choose the correct answer in each of the following questions: sec^(2)60^(@)-1=?

Choose the correct answer in each of the following questions: sin^(2)30^(@)+4cot^(2)45^(@)-sec^(2)60^(@)=?

Choose the correct answer in each of the following questions: cos^(2)30^(@)cos^(2)45^(@)+4sec^(2)60^(@)+(1)/(2)cos^(2)90^(@)-2tan^(2)60^(@)=?

Choose the correct answer in each of the following questions: If tan^(2)45^(@)-cos^(2)30^(@)=x sin45^(@) cos 45^(@) " then " x =?

Choose the correct answer in each of the following questions: (cos0^(@)+sin30^(@) +sin45^(@))(sin 90^(@) + cos60^(@)-cos45^(@))=?

Choose the correct answer in each of the following questions: If x tan 45^(@)cos60^(@)=sin 60^(@) cot60^(@) " then " x=?

Choose the correct answer in each of the following questions: If sinA + sin^(2)A=1 " then " cos^(2)A+cos^(4)A=?

Evaluate each of the following :- 4/(cot^(2)30^(@))+1/(sin^(2)60^(@))-cos^(2)45^(@)

Choose the correct answer in each of the following questions: If sin theta =(1)/(2) " then " cot theta=?