" Q20) Prove that (i) "(2^(30)+2^(29)+2^(28))/(2^(31)+2^(30)+2^(29))=(7)/(10)

Prove that (2^(30)+2^(29)+2^(28))/(2^(31)+2^(30)-2^(29))=(7)/(10)

PRove that (2^(30)+2^(29)+2^(28))/(2^(31)+2^(30)-2^(29))=(7)/(10)

Prove that : sin(2 times 30^(@))=(2tan30^(@))/(1+tan^(2)30^(@))

Prove that : sin(2 times 30^(@))=(2tan30^(@))/(1+tan^(2)30^(@))

(21)/(x^(2))-(29)/(x)-10=0

Prove that : cos(2 times 30^(@))=(1-tan^(2)30^(@))/(1+tan^(2)30^(@))

Show that ""^(30)C_(0) +""^(30)C_(1)+""^(30)C_(2) +…+ ""^(30)C_(14) =2^(29)-(1)/(2) (""^(30)C_(15))

Prove that: (sec 30)^2-(2tan 30 cosec 60)/(1+(tan 30)^2)-(cot 30)^2=0

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)

If the value of the sum 29(.^(30)C_(0))+28(.^(30)C_(1))+27(.^(30)C_(2))+…….+1(.^(30)C_(28))-(.^(30)C_(30)) is equal to K.2^(32) , then the value of K is equal to