15 you are given That cos (A)= TT with A in quad Iv, COS and cos ( B) = , WITh B in quad iv. Find cos (A-B)

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A: given  -cos(3t)sec(3t) = -1

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A: Show that the given identity, cos2θ=1+cos2θ2. Addition property:  cosA+B=cosAcosB-sinAsinB

Q: 6T cos 8 de : so O o o O

A: Here we will solve the  given integral,

Q: Go to your book on Section 5.2 problem set page 309 problem number 44. Find the exact answer for cos…

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A: given: cosα+cosβ=asinα+sinβ=b we have to show that  sin2α+sin2β=2ab1-2a2+b2 R.H.S: 2ab1-2a2+b2…

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A: We have,    cos ( 2 i ln(i) )

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Q: cos3θ+cos4θ=0.

A: Consider the given equation, cos3θ+cos4θ=0 By using the formula, cos(a + b) + cos(a - b) =…

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A: l have given the answer in the next step. Hope you understand that

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A: Three formulas for cos 2A are

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A: given  sinθ=-34we know sin2θ+cos2θ=1and sinθ=1cscθ

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Q: Express cos (a) in terms of cos(2a). Express sin? (a) in terms of cos(2a). cos²(a) Choose... sin (a)…

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