`tan^(-1)(tan15^@)`

Value of cos{tan^(-1) ("tan"(15pi)/4)} is :

Prove that, tan25^(@).tan15^(@)+tan15^(@)tan50^(@)+tan25^(@)tan50^(@)=1 .

The value of tan10^(@)tan15^(@)tan75^(@)tan80^(@) is

cos[tan^(-1){tan((15pi)/4)}]

cos[tan^(-1){tan((15pi)/4)}]

Write the value of tan^(-1){tan((15pi)/4)}

Write the value of "tan"^(-1)["tan"((15pi)/(4))] .

Write the value of tan^(-1){tan((15pi)/4)}

Find the value/ मान ज्ञात कीजिए: (tan60^@-tan15^@)/(1+tan60^@ tan15^@)

The expression ((1+tan37^(@))(1+tan8^(@))(1+tan15^(@))(1+tan30^(@)))/((1+tan2^(@))(1+tan43^(@))) reduces to