Write the expression as the cosine of an angle, knowing that the expression is the right side of the formula for cos(A - B) with particular values for A and B. Example: cos(130) cos(27) + sin(130) sin(27) = cos(130-27) = cos(103) cos (160°) cos (40°) + sin (160°) sin (40°) = Blank 1

Q: Find cos (a-B)if cos a = and tan B=-2 with a in quadrant 1 and Bnot in quadrant 2.

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Q: what is the degrees of cos θ/2 = 1

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Q: When we evaluate sin 2, how do we know whether to set the calculator todegree or radian mode?

A: Set the calculator to radian mode to evaluate sin 2.

Q: sin x sin y =

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Q: Sin63°.cos135°tan315° Sin240°-tan150°.cos153°

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Q: The value of the expression cosec (75° +0)-sec (15° -0)- tan (55° +0)+ cot(35°-0) is

A: cosec75°+θ=sec90°-75°+θ=sec15°-θ

Q: The sine of 80° has the same value as sine of 100. O True O False

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Q: Determine whether the statement "Using sum and difference formulas, I can find exact values for…

A: To determine whether the statement makes sense or not.

Q: there are sin, cos and tan on the calculator keys. Can you tell how can you get the value of tan?

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Q: Rewrite the expression tan x csc x cos x by changing to sines and cosines. Then simplify the…

A: Given expression is tanxcscxcosx.

Q: Use the cos(x+y) formula and unit circle angles to find the exact value if cos(105)

A: We know that                Cos(x+y)=Cos(x)Cos(y)-sin(x)sin(y) Here we have to find exact value of…