# (Sin π/12 - cos π/12)^2 Help?

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sin(π/12)-√3 (cosπ/12) =2[sinπ/12cos60-sin60cosπ/12 =2sin ... sin（π/12）-(√3)cos（π/12）= =2[cos(π/3)sin(π/12)-sin(π/3)cos(π/12)] =2sin ... - Read more

13 π 12 25) sin π 12 26) cos − 7π 12-2- - Read more

## (Sin π/12 - cos π/12)^2 Help? resources

### Area under curve - Physics Forums

Sketch the regions enclosed by the given curves. y = 3 cos 6x, y = 3 sin 12x, x = 0, x = π/12 Find the area as well. 2. ... y = 3 cos 6x, y = 3 sin 12x, x = 0, x = π/12

### cos ( A + B ) = cos A cos B - sin A sin B

... = sin A cos B + cos A sin B ... Find the exact value of cos 75 We can use the formulas to help us find ... sin70 sin20 sinπ 12 cos7 ...

### Trig help to find exact value for tan(-π/12)? - qfak.com

Trig help to find exact value for tan(-π/12)? ok this has been bugging me all day, ... (√2+√6)/4. then i did sin(-π/12)/cos(-π/12) which came out to (√2-√6

### What is (cos 15) ^ 2 – (sin 15)^2 - Homework Help ...

... What is (cos 15) ^ 2 – (sin 15)^2, Topics: Math, Tags ... your questions get answered first by our expert eNotes Educators—teachers who will help you move to ...

### SOLUTION: I would like some help with the following two ...

I will be eternally grateful for the help provided. Thanks again. A)find sin 7π /12 B) ... (π /4) to find cos π /12 Answer by stanbon(64569) (Show Source):

### Find the exact value of sin π/12 and tan π/12 by taking ...

... Find the exact value of sin π/12 and tan π/12 by ... Homework Help Find the exact value of sin π/12 and tan π/12 ... Substituting `sin pi/3,cos pi ...

### basic trigonometry problems, help? - Math Help Forum

given cos θ = 3/5, tan θ < 0 find: sin 2θ cos 2θ cot 2θ use half measure identities to find exact values of the following: tan 15 degrees sec π/12

### sin(π/12)-cos(π/12)=_360问答 - 360问答 - 你问大家答

... (π/12) sin(π/12)-cos(π/12)

### OpenStudy

pitanje Group Title. 6sin(π/12) cos(π/12) = 3(2 sin(π/12) cos(π/12) = 3sin (2) (π/12) = 3 sin (π/6) = 3 (1/2) =3/2 Why is 6 sin divided into 3sin (2) and what ...

### Angle Sum+Difference Identities

13 π 12 25) sin π 12 26) cos ... 13 π 12 2 − 3 25) sin

### Calculus: problem, half / double angle formulas

... (π/12) = (1-cos(π/6))/sin(π/6), we get tan(π/12) = (1 - sqrt[{1+cos(π/3)}/2)/sqrt[{(1-cos(π/3)}/2]. Since the cos(π/3) is known to be √3/2,

### Find area under the curves: y = 6 cos 2x, y = 6 sin 4x, x ...

Area = ∫ [0 to π/12] (6 cos 2x − 6 sin 4x) dx + ∫ [π/12 to π/4] (6 sin 4x − 6 cos 2x) dx..... = 3/4 + 3/4 ... Calculus help? Area between two curves?

### 1、-cos^2(π/12)+sin^2(π/12)=？（求值）_易学网

1、-cos^2(π/12)+sin^2(π/12)=？（求值）2、(cos^210°-cos^280°）^2+cos^270°=？（化简）3、sin^4a+cos^4a+1/2sin^22a=？

### 1、-cos^2(π/12)+sin^2(π/12)=？（求值）

... +sin²(π/12) =-[cos²(π/12)-sin²(π/12)] =-cos(2*π/12) =-cos(π/6) =-√3/2 ( 负2分之根号3) ... 3、sin^4a+cos^4a+1/2 sin²2a=(sin^4 a+cos^4 a+2sin² ...

### sin(π/12)-cos(π/12)= - 百度知道 - 全球最大中文 ...

sin(π/12)-cos(π/12)=-√(1/2)=-√2/2

### Trigonometry - Angle Sum+Difference Identity - Scribd

π 12 Use the angle difference identity to find the exact value of each. 21) ... sin 15) tan 75° 17) cos 75° π 12 16) ... Help; FAQ; Press; Purchase help;

### 7.2: Compound Angle Formulas - Wikispaces

... Use the Compound Angle Formulas to help ... triangle angles of π/6, π/3, π/4 and π/2. a) cos( π/12 ... sin (x + π) and cos (x + π/2 ) ...

### Questions

cos2 x+sin2 x = 1 cos(u−v) = cosucosv +sinusinv sin(u+v) = sinucosv +cosusinv Any other formula I need I will derive from these. Questions ... π 12 = −2+ ...

### Hence express tan (pi/12) in surd form. - Physics Forums

I know that tan =sin/cos and 2√2 e^i(π/12) = 2√2[cos(π/12) ... I should be right from here thanks for tips, your help really helps!!.

### sin(kπ/6)=1/2sin(π/12)[cos(2k-1)π/12-cos(2k+1)π/12 ...

... (kπ/6+π/12) = cos(kπ/6)cos(π/12) - sin(kπ/6)sin(π/12) 上述两式相减，得 2*sin(kπ/6)sin(π/12 ... cos(2k+1)π/12] =1/[2sin(π/12)] * 2*sin(kπ/6 ...

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