Learn how to find the exact value of an angle using sum formula for tangent

👉 Learn how to evaluate the tangent of an angle in degrees using the sum/difference formulas. To do this, we first express the given angle as a sum or a difference of two (easy to evaluate) angles, then we use the unit circle and the Pythagoras theorem to identify the angles and obtain all the needed trigonometric function values of the angles. When we know the trigonometric function values of the two angles to be added or subtracted, we can apply the sum and difference formulas to evaluate the tangent of the given angle.

Organized Videos:
✅ Sum and Difference Formulas
✅ Evaluate Sum and Difference Formulas from a Triangle
✅ Simplify an Expression using Sum and Difference Formulas
✅ Write the Expression as a single function | Sum and Difference Formulas
✅ Verify Identities using Sum and Difference Identities
✅ Evaluate Tangent using Sum and Difference Formulas
✅ Evaluate Cosine using Sum and Difference Formulas
✅ Evaluate Sine using Sum and Difference of Two Angles
✅ Solve Equations using Sum and Difference Formulas

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[Sarabutontheinternet]

I'm sorry to break it to you guys, but for anyone who watches this video in the future, it's incorrect. The problem should have been solved by the middle of the video. He was correct until the middle part. When it says "1 plus root 3 over 3" divided by "1 minus root 3 over 3" he was supposed to DIVIDE THE BOTTOM THREE, resulting in "1+ the square root of 3" divided by "1- the square root of 3". If none of these words are making any sense, take out a paper and write it out, it will make a bunch more sense. I was stuck trying to understand where it went wrong, thinking that I was wrong. Obviously the teacher meant no harm. But just to be safe, the actual, correct answer is "1+ the square root of 3" divided by "1- the square root of 3". Hope this helps future kids lol- from first year college student.

[tanya]

this is definitely wrong :( its meant to be 2 + root 3

[googlekys]

wouldn't the answer simplify to 2 + root 3 ?

[brookedetoro]

DON'T mean to be rude but the answer should actually be 2+ root3.

[princessedisamallonga]

Wait isn't tan π/6 equal to 1/√3 ?_?