Question number IS to 22 carrymarks eac13 If tan 2A cot (A- 18), where

1.	Question number IS to 22 carrymarks eac13 If tan 2A cot (A- 18), where 2A is an acute angle, find the value of A.
Answer» Cot ( 90 - x ) = tan x According to the problem given, Tan 2A = cot ( A - 18 ) Cot ( 90 - 2A ) = cot ( A - 18 ) Remove the cot both sides we get , 90 - 2A = A - 18 -2A - A = - 18 - 90 - 3A = - 108 A = ( - 108 ) / ( - 3 ) A = 36°

Question number IS to 22 carrymarks eac13 If tan 2A cot (A- 18), where 2A is an acute angle, find the value of A.

Answer»

Cot ( 90 - x ) = tan x

According to the problem given,

Tan 2A = cot ( A - 18 )

Cot ( 90 - 2A ) = cot ( A - 18 )

Remove the cot both sides

we get ,

90 - 2A = A - 18

-2A - A = - 18 - 90

- 3A = - 108

A = ( - 108 ) / ( - 3 )

A = 36°