Use the given sum or difference identity to find sin(a + B) exactly, given that cos a = such that 6. a terminates in quadrant IIl and cos B 1 such that B terminates in quadrant II then: %3D sin(a + B) = sin(a)cos(8) + cos(a)sin(8) sin(a + B) sin(a + B) =

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Q: 6. 2/10 2.

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Q: Let cos(22∘)≈0.9272. What is the the value of xx, in degrees, for sin(x)≈0.9272 ?  what does X = ?

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A: Use the formula cos 2θ=1-2sin2θ and substitute x2 for θ and then 45 for cos x.

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Q: Find the exact value of COs 2x given that sin x = III. and X is in quadrant 25 16 25 7. 25 16 25 3/5

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Q: Given that sin(a) = and cos(b) 5 with a %3D 4 sin(a + b) = %3D cos(a - b) = %3D

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Q: Compute the indicated sin α = 15 17 cos B = cos = (a) (b) - 4 5 quantity using the following data.…

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Ratios

A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.

Trigonometric Ratios

Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.