`sec^(2)(70^(@))-tan^(2)(70^(@))` is equal to

cos^(2)20^(@)+cos^(2)70^(@) is equal to :

What is sin^(2)20^(@)+sin^(2)70^(@) equal to ?

The value of (1+sec20^(@)+cot70^(@))(1-"cosec"20^(@)+tan70^(@)) is equal to

(2sin68^(@))/(cos22^(@))-(2cot15^(@))/(5tan75^(@))-(3tan45^(@).tan20^(@).tan40^(@).tan50^(@).tan70^(@))/(5) is equal to

4tan^(2)A - 4sec^(2)A is equal to:

tan100^(@)+2tan70^(@)=

(tan80^(@)-tan10^(@))/(tan70^(@))

The value of sin^2 20^@ +sin^2 70^@ - tan^2 45^@+sec 60^@ is equal to : sin^2 20^@ +sin^2 70^@ - tan^2 45^@+sec 60^@ का मान किसके बराबर है?