Emery Adkins

Questions

• If Jane walks north for 3 miles, turns 45∘ to the right, and then walks another 4miles, how many miles will Jane be from her starting point? Give your answer as a decimal rounded to the nearest hundredth.
• Cos^2 3pi/8 how do i find the exact value of the trig function with the denominator being a 4? i’m not using half angle formula.
• How do I solve #(2sqrt2-2)cosalpha=3sin^2alpha+sqrt2-4#?
• Determine the quadrant of the angle’s terminal line lies Sin x = -0.45 & cos x < 0 ?
• The dept sensor on a boat showsthat the boat is 57 feet above the seafloor.The rope that holds the anchor is 80 feet long. Approximate the angle of depression from the boat to the anchor on the seafloor to the nearest tenth of a degree?
• How do you graph #y= 1+ 5\sin \frac { \pi } { 2} ( x + 0.7)#?
• Prove the trigonometric identity ?
• For a cosine function with amplitude A=0.75 and period T=10, what is y(4)?
• If you were given a radian e.g. 3pi/4, how were you to know whether to use sin, tan or cos when finding the exact answer?
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• Using Polar coordinates, what is the area of region A?
• How do you prove #(1+sec(x))/(sin(x)+tan(x))= csc(x)#?
• Simplify sin6t/sin2t - cos6t/cos2t ?
• If #theta# is eliminated from the equation #x=acos(theta-alpha)# and #y=bcos(theta-beta)# then prove that #(x/a)^2+(y/b)^2-(2xy)/(ab)cos(alpha-beta)=sin^2(alpha-beta#)?
• Prove sec x - tan x sin x = (1/sec x) ?
• Show using complex numbers that 8sin^4x = cos4x - 4cosx + 3?
• If A+B=225°, then find the value of #(cot A/(1+cot A))(cot B/(1+cot B))#?
• How do you prove #sin(x+y)# = #(tanx+tany)/(secxsecy)# ?
• Given that there exists a triangle whose sides are a,b,c. Then prove that there exists a triangle whose #sqrta,sqrtb,sqrtc#?
• How to solve this equation? The topic is Radian Measure of Angle size.
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