[" Question No."30],[60^(2)-59^(2)+58^(2)-57^(2)+....+2^(2)-1^(2)=]

60^(2)-59^(2)+58^(2)-57^(2)+ cdots +2^(2)-1^(2) =

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: sin^(2)30^(@)+4cot^(2)45^(@)-sec^(2)60^(@)=?

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

Sum of last 30 coefficients in the binomial expansion of (1+x)^(59) is a) 2^(29) b) 2^(59) c) 2^(58) d) 2^(59)-2^(29)

2tan ^ (2) 45 ^ (@) + cos ^ (2) 30 ^ (@) - sin ^ (2) 60 ^ (@)

The value of sin^(2)30^(@).cos^(2)45^(@)+2tan^(2)30^(@)-sec^(2)60^(@) is equal to :

Find the value of the following: (i) "sin"^(2)30^(@)+"sin"^(2)45^(@)+"sin"^(2)60^(@)+"sin"^(2)90^(@) (ii) 2"sin"^(2)30^(@)-3cos^(2)45^(@)+cos^(2)60^(@)

Using the trignomertric table, evaluate (a) sin^(2)30^(@)+cos^(2)30^(@) (b) sec^(2)60^(@)-tan^(2)60^(@) .