# 8. a. Prove that f(x) = cos x is continuous on R. b. If ECR and... related homework questions

• #### 8. a. Prove that f(x) = cos x is continuous on R. b. If ECR and... 8. a. Prove that f(x) = cos x is continuous on R. b. If ECR and f: E R is continuous on E, prove that 8(x) = cos (f(x)) is continuous on E. 9. For each of the following equations, determine the largest subset E of R such that the given equation

• #### Solve the following equation for 0 less than and/or equal to "x" less than and/or equal to 360 -- cos^2x - 1 = sin^2x -- Attempt: cos^2x - 1 - sin^2x = 0 cos^2x - 1 - (1 - cos^2x) = 0 cos^2x - 1 - 1 + cos^2x = 0 2cos^2x - 2 = 0 (2cos^2x/2)= (-2/2) cos^

Solve the following equation for 0 less than and/or equal to "x" less than and/or equal to 360--cos^2x - 1 = sin^2x--Attempt:cos^2x - 1 - sin^2x = 0cos^2x - 1 - (1 - cos^2x) = 0cos^2x - 1 - 1 + cos^2x = 02cos^2x - 2 = 0(2cos^2x/2)= (-2/2)cos^2x = -1cosx = square root of -1And I can't do anything...

• #### What David Ricardo saw was thát it could still be mutually beneficial for both countries to... What David Ricardo saw was thát it could still be mutually beneficial for both countries to specialize and trade COUNTRY WHEAT WINE England (270) man hours) Portugal (180 man hours 15 10 30 15 BEFORE TRADE (i.e. NO TRADE, or AUTARKY) COUNTRY WHEAT WINE England (270) man hours) Portugal (180 man hours) TOTAL COUNTRY WHEAT WINE England (270) man hours)...

• #### 2. A dragon is flying around in a pattern given by the parametric curve r(t) (cos(t) cos((sin(t) sin(t) cos(t)j. cos(t) - cos sin(t)-sin(t) cos(t))j (a) Find a formula for the velocity of the dragon... 2. A dragon is flying around in a pattern given by the parametric curve r(t) (cos(t) cos((sin(t) sin(t) cos(t)j. cos(t) - cos sin(t)-sin(t) cos(t))j (a) Find a formula for the velocity of the dragon at time t (b) Find all the times at which the dragon's speed is zero. Explain your reasoning. c) Does the path of the dragon contain...

• #### tions... And finally, Qa-F and ecr are not equal, and ehe I S ) The diagram shows a short rod (red) resting a distance a above and perpendicular to an infinite non-conducting sheet (green) with ch... tions... And finally, Qa-F and ecr are not equal, and ehe I S ) The diagram shows a short rod (red) resting a distance a above and perpendicular to an infinite non-conducting sheet (green) with charge density The rod has a non-uniform charge density on it, and a total charge Qo Assuming that a small element of charge on the...

• #### 8. (a) (5pt) Prove the identity: cscx -cos x=sec x . sin'x 4 and tan θ<0 (b) (5pt) Find cos θ , if sin θ 8. (a) (5pt) Prove the identity: cscx -cos x=sec x . sin'x 4 and tan θ 8. (a) (5pt) Prove the identity: cscx -cos x=sec x . sin'x 4 and tan θ<0 (b) (5pt) Find cos θ , if sin θ 8. (a) (5pt) Prove the identity: cscx -cos x=sec x . sin'x 4 and tan θ

• #### develop a photon language programming code for cloud and Lene Dev ECR refrigeration and air conditioning...

develop a photon language programming code for cloud and Lene Dev ECR refrigeration and air conditioning system hybrid connected with dehumidifier which produces 60 50 and 45 degree centigrade temperature also write the parameter which are affecting the performance of the system developed also claim the temperature attained by this time

• #### Prove: cos4x = 8cos^4x - 8cos^2x + 1 My Attempt: RS: = 4cos^2x (2cos^2x - 1) + 1 = 4 cos^2x (cos2x) + 1 LS: = cos2(2x) = 2cos^2(2x) - 1 = (cos^2(2)) - cos^2(2x)) - 1 ----- Prove: 8cos^4x = cos4x + 4cos2x + 3 My Attempt: RS: = cos2(2x) + 4cos(

Prove:cos4x = 8cos^4x - 8cos^2x + 1My Attempt:RS:= 4cos^2x (2cos^2x - 1) + 1= 4 cos^2x (cos2x) + 1LS:= cos2(2x)= 2cos^2(2x) - 1= (cos^2(2)) - cos^2(2x)) - 1-----Prove:8cos^4x = cos4x + 4cos2x + 3My Attempt:RS:= cos2(2x) + 4cos(2x) + 3= 2cos^2(2x) - 1 + 2(4)cos^2(2x) - 1 + 3

• #### n July of this year, Stephen started a proprietorship called ECR (which stands for electric car...

n July of this year, Stephen started a proprietorship called ECR (which stands for electric car repair). ECR uses the cash method of accounting and Stephen has produced the following financial information for this year. ECR collected \$81,000 in cash for repairs completed during the year and an additional \$3,200 in cash for repairs that will commence after year end....

• #### Schedule C 2019 55. In July of this year, Stephen started a proprietorship called ECR (which... Schedule C 2019 55. In July of this year, Stephen started a proprietorship called ECR (which stands for electric car repair). ECR uses the cash method of accounting and Stephen has produced the following financial information for this year: · ECR collected \$81,000 in cash for repairs completed during the year and an additional \$3,200 in cash for repairs that...

• #### Using the equation:Integral of cos^(n)xdx = (cos^(n-1)xsinx)/n + (n-1)/n integral cos^(n-2)xdx prove wallis's formula: intergral cos^(n)xdx = (1/2)(3/4)(5/6)

Using the equation:Integral of cos^(n)xdx = (cos^(n-1)xsinx)/n + (n-1)/n integral cos^(n-2)xdx prove wallis's formula: intergral cos^(n)xdx = (1/2)(3/4)(5/6)...((n-1)/n)(pi/2)

• #### Trig Identity Prove: cos(x+y)cos(x-y)=cos^2(x)+cos^2(y)-1

Trig Identity Prove:cos(x+y)cos(x-y)=cos^2(x)+cos^2(y)-1

• #### Prove each identity: a) 1-cos^2x=tan^2xcos^2x b) cos^2x + 2sin^2x-1 = sin^2x I also tried a question on my own: tan^2x = (1 – cos^2x)/cos^2x R

Prove each identity:a) 1-cos^2x=tan^2xcos^2xb) cos^2x + 2sin^2x-1 = sin^2xI also tried a question on my own:tan^2x = (1 – cos^2x)/cos^2xR.S.= sin^2x/cos^2x I know that the Pythagorean for that is sin^2x + cos^2x That's all I could do.

• #### Prove that the given equations are identities: a)cos (30°+x)+ cos (150°-x)=0 b)cos (60°+x)- cos (300°-x)=0

Prove that the given equations are identities: a)cos (30°+x)+ cos (150°-x)=0 b)cos (60°+x)- cos (300°-x)=0

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