Post a New Question

trig

posted by .

I have heard that trig CAN be super easy, that there are just, like, 10 rules you need to memorize then all the problems are easy.

... Does anyone know what these are?

Thanks!

  • trig -

    I would say they are the definitions of tan, cot, sec and csc in terms of sin and cos,
    tan = sin/cos
    cot = cos/sin
    csc = 1/sin
    sec = 1/cos


    sin^2 + cos^2 = 1

    the law of sines

    the law of cosines

    sin (a + b) = sin a cos b + cos b sin a

    cos (a + b) = cos a cos b - sina sin b

    tan (a + b) =
    (tan a + tan b)/[1 -(tan a tan b)]

    Others may differ

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math,help

    can someone explain to me also how to do addition with equations. Solve the system by addition 5x-3y=13 4x-3y=11 its easy try properly It's not easy "It's not easy" Then how come I found the answer: x = 2; y = -1, in just five seconds …
  2. Easy (yet confusing) Algebra

    These problems are pretty easy, but confusing (as stated in the subject line). |2x+5|-x=10 |3x+4|-2x=11 I know there are supposed to be two answers for each problem, for the first problem I got 5 and for the second problem I got 7. …
  3. Super Easy Science - SUPER SIMPLE QUESTION!!!!!

    how do I do i stay focused while writing a report?
  4. Trig

    I was just wondering if anyone can explain the Law of Sines- "Ambiguity Case" to me, in a way that is easy to understand.
  5. Trig

    Rules of Logarithms: Can someone explain how to do: 1) e^(2(ln)(x)) 2) e^(-lnx) I know the rules I just don't understand how they apply.. thanks!
  6. trig

    rules of logarithms: can someone please explain how to do these problems?
  7. 10th grade

    HOW DO YOU YOU ADD ALL THE HEARD MATH WITH THE EASY
  8. language infinitives

    Some facts are easy enough to memorize. to memorize is the infinitive is it used as an adverb?
  9. trig

    I am currently taking a trig class. I need help understanding how to solve for sin,cos, and tan in problems which give an angle and a side length or the hypotenus. Any help would be muchly appreciated
  10. Economics

    Which of the following is an advantage of a sole proprietorship?

More Similar Questions

Post a New Question