If sino + sin'0 +sin' 0 = 1, then prove that cos 0-4 cos* 0+8cos 0 = 4.

Q: Prove cos - sine cos + sin sec 28-tan 20.

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Q: Prove a) cos(0+0) = COSOCOS-sinesind

A: Since you have asked multiple questions in a single request so we will be answering only first…

Q: cos49-sin*0 2. = 1– tan20 cos²0

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Q: tan (sin-)

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Q: 2 | sin' O cos' OdO O cos

A: I have stated the used formula in the solution

Q: is there a proof that cos^2t +sin^2t=x^2 + y^2 =1 ? if there is , how?

A: To prove the below statement Consider a right angle triangle as shown below

Q: 11) Prove cos+x -sinfx = cos 2x

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Q: Find an algebraic formula for cos (tan-1 u + sin¬1 v), then use that formula to 1 compute cos…

A: given function ,  costan-1 u + sin-1 v  ..........................eq.(1) now we have to find an…

Q: sin' t – cos' t Prove tan?t – 1 cos? t

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Q: 10) Verify the identity sin0+cos0 sin0-cose %3D = sec0csc0 cose sino

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Q: 6) Prove cos4x -sin+x= cos 2x

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Q: identities are most useful for proving that 2cosx = cos 2x +1? What two common

A: Using identities of trigonometric function

Q: . is cos(cos^-1 1.7=1.7 true?     2. is sin^-1 (sin80*)=80* true?

A: We know the basic relations      cos(cos-1x)=x Because cos and cos-1 are opposite functions,…

Q: csc² x+sec² x 1 cos² sin² 10

A: As we know from the trigonometric identity: 1). sinx=1cscx 2). cosx=1secx 3). sin2x+cos2x=1   Given:…