132. tan 40+ 2tan 10° is equal to (a) tan 60° (c) cot 40° (b) tan 50° (d) none of these

132.tan40+2tan10 is equal to (a)tan60(c)cot40(b)tan50(d) none of these

tan40^(@)+2tan10^(@) is equal to

tan 40^circ + 2tan 10^circ is equal to

The value of 2tan^(-1)(cos ec tan^(-1)x-tan cot^(-1)x) is equal to (a)cot ^(-1)x( b ) (cot^(-1)1)/(x) (c)tan ^(-1)x (d) none of these

tan 20^(@) tan 40^(@) tan 80^(@) = tan 60^(@)

Prove that: tan 50 ° - tan 40 ° = 2 tan 10 °

tan 20^(@) tan 40^(@) tan 60^(@) tan 80^@=

Prove that tan 40^(@) + 2 tan 10^(@) = tan 50^(@)

Prove that tan 50^(@) -tan40^(@)-2tan10^(@) .

(cot50^(@))/(tan40^(@))