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Given that cos(3x)=acos^x−bcosx is a trigonometric identity, what is the

Given that cos(3x)=acos^x−bcosx is a trigonometric identity, what is the value of a+b ?
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2. asked by Tony
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Given that cos(3x)=acos^3(x)−bcos(x) is a trigonometric identity, what is the value of a+b
1. 1 answer
2. asked by Tony
3. 351 views
Verify that the trigonometric equation is an identity. 1/2 sin 2 x − sin^2x over sinxcos2x = 1 over sinx+cosxVerify that the
1. 2 answers
2. asked by Ricky
3. 598 views
if tanX=a/b, then show that asinX-bcosX/asinX+bcosx = a^2-b^2/a^2+b^2
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2. asked by krishan
3. 1,100 views
Georgina is told that an angle has a sine of sqrt 5/5 and is in quadrant 2. Use the Pythagorean identity sin^2(0) + cos^2(0) =1,
1. 1 answer
2. 27 views
Electrons in an oscilloscope are deflected by two mutually perpendicular electric fields insuch a way that at any time t the
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2. asked by Ashik
3. 703 views
What is the tangent for an angle that has a cosine of −1/7√ and is in Quadrant III? Use the Pythagorean identity
1. 3 answers
2. 87 views
Steph is told that an angle has a sine of 1/4 and is in Quadrant II. Use the Pythagorean identity sin^2(θ)+cos^2(θ)=1 , the
1. 1 answer
2. 9 views
Georgina is told that and angle has a sine of √5/5 and is in quadrant II. use the Pythagorean identity sin^2(0) + cos^2(0) =
1. 1 answer
2. 93 views
Blake is told that an angle has a cosine of −16√and is in Quadrant III. Use the Pythagorean identity sin2(θ)+cos2(θ)=1 ,
1. 1 answer
2. 6 views