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Trigonometry
simplify
cosxcscx/cot^2x
cosxcscx/cot^2x
Trigonometry
cot 65degrees-cos25degrees/sin25degrees what's the exact value?
Trigonometry
I need help with this question. There are 3 circumferences of radius 115, 150, 225. They are externall tangents between them. Which are the angles that are formed when the centers of the circumference come together.
Trigonometry
Let d represent the days since Jan 1 2013. When d=0, 100% of the viewable moon surface is illuminated. When d=14.75, we have that 0% is illuminated.
(a) Find a sine function V(d) to model this situation. Where V is the percentage of the surface that is illuminated and d is the number of days since Jan 1, 2013. Show how you find the period, amplitude, horizontal shift, and midline of the function.
(b) Using function transformation and knowledge of sine and cosine, find a cosine function C(d) which models the same situation. Dont go through the process from part (a).
(c) Solve V(d)=0 on the interval 0≤d≤180 algebraically. Interpret the results in context, and verify it by giving graphical evidence.
(d) Someone claims that part (c) can be solved by simply plotting cos^-1(d) and evaluating at d=-1. Explain what is wrong with that reasoning.
(a) Find a sine function V(d) to model this situation. Where V is the percentage of the surface that is illuminated and d is the number of days since Jan 1, 2013. Show how you find the period, amplitude, horizontal shift, and midline of the function.
(b) Using function transformation and knowledge of sine and cosine, find a cosine function C(d) which models the same situation. Dont go through the process from part (a).
(c) Solve V(d)=0 on the interval 0≤d≤180 algebraically. Interpret the results in context, and verify it by giving graphical evidence.
(d) Someone claims that part (c) can be solved by simply plotting cos^-1(d) and evaluating at d=-1. Explain what is wrong with that reasoning.
Trigonometry
square root 3csc -2=0 solve the equation
Trigonometry
If
M2 + M12 + 2 MM1Cosθ = 1, N2 + N12 + 2 NN1Cosθ = 1,
MN + M1N1 + (MN1 + M1N) Cosθ = 0,
Then M2+N2 = ?
M2 + M12 + 2 MM1Cosθ = 1, N2 + N12 + 2 NN1Cosθ = 1,
MN + M1N1 + (MN1 + M1N) Cosθ = 0,
Then M2+N2 = ?
Trigonometry
prove that sin(b-c)+bsin(c-a)+csin(a-b)=0
Trigonometry
in triangle abc,prove that a sin(b-c)+bsin(c-a)+csin(a-b)=0
Trigonometry
simply the expression by first substituting values from the table of exact values and then simplifying the resulting expression. (tan 45* + tan 60*)^2 (^2=squared)
Trigonometry
ABC with C=90degree. solve for all the missing parts using the given info; A=12degree 42', b=6.832cm
B=______ ______
a=
c=
B=______ ______
a=
c=
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