(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Given that sin θ =1/2, cos θ =–((√3)/2) and 0° < θ < 360°,

(a) find the value of θ;

(b) write down the exact value of tan θ.

2. Relevant equations

A; sin(180-θ)=sin(θ) and cos(180-θ)=-cos(θ)

3. The attempt at a solution

Using an calculator left me with that θ=30° but i asked a friend of mine wich got it to be 150. Now she has b-level math while i have a-level math so she siad she used some short of tabel to find the answer and that high level where supposed some furmula to find it... now i suspect that furmula A (wich i found in my course book)has something to do with this but i'm unnable (tired maybe) to wrap my head around it.

as to proplem b i think the sullution is

cos(θ)/sin(θ)=tan(θ) or opposit but i dont remember wich way it is...

Please help and thanks in advance

Youre my heroes

Edit:just uploaded the original homework document just to be sure :-)

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: How to find θ by knoving sin/cos

**Physics Forums | Science Articles, Homework Help, Discussion**