In trigonometry, there are certain angles known as "special angles". This is because when you take sin, cos or tan of one of these angles, you get a result These special angles are always multiples of either pi/6, or pi/4. Here is a visualization of all the special angles, and their corresponding trig values.

Mar 08, 2020 · Here we have an angle, 12 degrees, and know the adjacent side (6 km) and we want to know the length of the opposite side (O). The formula that will help us is the tangent: Substituting in the appropriate values, Rearranging to isolate O, O=tan(12)*6km Using a calculator, the value of tan(12) is 0.213. So O= 0.213*6km

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