1 Cos 2x 1 Sinx
Does 1 - sin^2x = cos^2x?
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Homework Statement
My book is showing 1 - (sin^2)x = (cos^2)ten, is this true? If so under what subject do I observe more information about this. I found cofunction identities where sin(90° - θ) = cosθ but I'one thousand not certain if that'south the aforementioned thing.
Homework Equations
The Attempt at a Solution
Answers and Replies
Homework Statement
My book is showing one - (sin^2)x = (cos^two)ten, is this true? If so under what subject practice I find more information well-nigh this. I found cofunction identities where sin(90° - θ) = cosθ but I'm non sure if that'due south the same affair.
Homework Equations
The Attempt at a Solution
Simply rearrange [itex]\sin^ii x + \cos^two x = 1[/itex], which you recently asked well-nigh in another thread.
Yes, depict a correct triangle and characterization one of the angles x. Now label each side a, b and c. Ok so what is sin(x) in terms of a,b,c? So what is sintwo(x)? Go on this for cosii(ten) and yous'll meet the effect holds.My book is showing 1 - (sin^2)10 = (cos^2)ten, is this truthful?
Basic trigonometry? Afterwards existence taught virtually graphing trig functions I believe you're exposed to more trig identities.If so under what discipline practice I detect more data near this.
thanks, i experience stupid, but at to the lowest degree i know the respond
thanks, i feel stupid, but at least i know the respond
Nah being stupid would be not knowing the reply in the exam
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1 Cos 2x 1 Sinx,
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