tan70^(@)-tan20^(@)" is equal to "

tan 70^(@) - tan 20^(@)=

tan70^@ is equal to

sec^(2)(70^(@))-tan^(2)(70^(@)) is 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

The value of (cot 54^@)/(tan 36^@)+(tan20^@)/(cot70^@) is equal to:

tan 70^(@) -tan 20^(@) - 2 tan 40^(@) = 4 tan 10 ^(@).

Assertion (A) : tan 70^(@) - tan 20^(@) = 2 cot 40^(@) Reason (R ) : If A + B = 90^(@) then tan A. tan B = 1

Prove that tan 70^(@) - tan 20^(@) - 2 tan 40^(@) = 4 tan 10^(@) .