Use cos(u + v) = cos(u) cos(v) — sin(u) sin(v) or cos(u − v) = cos(u) cos(v)+sin(u)sin(v) to find the cos(165°).

Q: If cos x = 0.62 and P(x/2) is in QII, then cos(x/2) is equal to?

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Q: Solve the following: (10 points each) 1. For cos x- sin y =-, find the value of k so that (y'+y") =…

A: We have to find value of k.

Q: If sin\theta =-(1)/(2) and 3\pi <\theta <(7\pi )/(2), then

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Q: Find the value of the function if it is defined. If it's not defined explain why. sec (cos−1 (−0.4))…

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Q: Find   cos(u2)cos(u2)   if   secu=9.545

A:

Q: 12. Solve the equation 4 cos? x-1= 0 on the interval [0,2TT).

A: to solve the following equation4cos2x-1=0x∈0, 2π

Q: If cos x = and sI< 27, then tan 2x %3D

A: Given,           cosx=45 , 3π2≤x≤2π.

Q: 1+cos5x 4. Evaluate y'for y = and simplify the answer sin5x

A:

Q: Diff eqn. 25) y' + (tan x)y = cos x when -pi/2 < x < pi/2

A: NOTE: Refresh your page if you can't see any equations. . compare this DE with  so here we have

Q: Find L{cos() + sin(5)} Note: L{cos(bt)} P and L{sin(bt)} In the first part b = and in the second…

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Q: Find   cos(u/2) if   tan u=3.908

A: We will use various trigonometric identities to solve this

Q: 4. (a) Find sin (0) given that cos (0) = 1/5 and 0 is in quadrant IV.

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Q: Cos(theta)=1/6 with theta is Q4, find Sec(theta/2).

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Q: 15. Find the following EXACT: (a) sin[cos'(2/3)] (b) sin[tan(-6)]

A: We use sin[cos-1(x)]= √(1-x2) and sin[tan-1(x)]=x/√(1+x2)

Q: Create a left side right side check for the following equation, cos(x) / 1-sin(x)+cos(x) / 1+sin(x)=…

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