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22 votes
22 votes
Please

\sin(120) \\ \tan( (3\pi)/(4) )
help me I need help​

User PouyaB
by
2.7k points

2 Answers

19 votes
19 votes


\\ \rm\longmapsto sin120


\\ \rm\longmapsto sin(90+30)


\\ \rm\longmapsto cos30


\\ \rm\longmapsto (√(3))/(2)

Now


\\ \rm\longmapsto tan\left((2\pi)/(4)\right)


\\ \rm\longmapsto tan135


\\ \rm\longmapsto -1

User Mohanraj
by
3.0k points
9 votes
9 votes

Answer:


\sin(120) \\ = \sin(90 + 30) \\ = \cos(30) \\ = ( √(3) )/(2) \\ \\ \tan( (3\pi)/(4) ) \\ = \tan(135) \\ = \tan(90 + 45) \\ = - \cot(45) \\ = - 1

User Maruta
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3.0k points