Question

Solve:
cos‏θ - (tan‏θcos‏θ)=0 for 0≤‏θ≤2pi

Answer 1

\[\cos \Theta = \tan \Theta \cos \theta\]

Answer 2

\[1 = \tan \theta\]

Answer 3

\[\theta = \tan^{-1} (1)\]

Answer 4

That's at pi/4, 5pi/4 between 0 and 2pi

Answer 5

factorise
cosΘ(tanΘ - 1) = 0
cos Θ =0, tanΘ = 1

Θ = pi/2 , pi/4 , 5pi/4