Question

tan 112.5

Answer 1

hmm are you doing trig? have you covered the half-angle identities yet?

Answer 2

-0.68023235825.....not sure, I just put it into google

Answer 3

you multiply 112.5 * 2/2

Answer 4

When you do this, you get sin(225/2) and you use your half angle identity, which is
\[\sin(\frac{ x }{ 2 })= \sqrt{\frac{ 1-cosx }{ 2}}\]

Answer 5

\[\sin(\frac{ 225 }{ 2 }= \sqrt{\frac{ 1-\cos(225) }{ 2 }}\] and now you solve