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anonymous

  • 5 years ago

2 (cos^2 (2 t) + sin^2 (2 t)) I do not remember where to go next to simplify but I am trying for cos^2+sin^2=1

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  1. anonymous
    • 5 years ago
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    or i mean to ask what role does 2t take on

  2. anonymous
    • 5 years ago
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    should i just use double angle?

  3. anonymous
    • 5 years ago
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    i mean power reducing...

  4. anonymous
    • 5 years ago
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    imagine 2t as x, it's the angle; so cos^2 (x) + sin^2(x) = 1, then 2(1) = 2 ^_^

  5. anonymous
    • 5 years ago
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    i did the power reducing and got same thing, but thanks for that tip!

  6. anonymous
    • 5 years ago
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    lol, np :)

  7. anonymous
    • 5 years ago
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    I believe you do have to use the double angle formula.

  8. anonymous
    • 5 years ago
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    Use double angle formula since you cant really use (sinx)^2+(cosx)^2=1 on this example.

  9. nowhereman
    • 5 years ago
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    That is nonsense! Of course you can use\[\sin^2 x + \cos^2 x = 1\] because you can plug in x = 2t without a problem.

  10. anonymous
    • 5 years ago
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    why do you need the double angle formula? that makes stuff so complicated, we already know that cos^2(x) + sin^2(x) = 1 x acts as an angle and it can be anything, 2t, w, z, c whateva form, it's still an angle

  11. anonymous
    • 5 years ago
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    true dat

  12. anonymous
    • 5 years ago
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    hmm... interesting

  13. anonymous
    • 5 years ago
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    write it down on paper and you'll see what I mean @rg ^_^

  14. anonymous
    • 5 years ago
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    yes, she is so right, I mean, every time I write it down on paper everything looks much more understandable, dont try to do everything in your head, unless ofcourse, you are doing maths just to increase your brains processing power... anyway.. it is a good idea to write it down...

  15. anonymous
    • 5 years ago
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    lol andy ^_^

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