Question

find the value of A if :
tanA-2cosA.tanA+2cosA-1=0​

Answer 1

Answer:

answer is above in the attachment..

Answer 2

tanA−2cosAtanA+2cosA−1=0

tanA−2cosAtanA=1−2cosA

tanA(1−2cosA)(tanA−1)

(1−2cosA)(tanA−1)=0

(1−2cosA)=0;(tanA−1)=0

cosA= ½ ;tanA=1

A=60° ;A=45°