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1. ### How to prove trigonometric identities?

...: tan² θ cos² θ + cot² θ sin²θ = 1 LHS = (sin²θ/cos²θ) × cos² θ+ (cos²θ/sinθ²...

1 Answers · Science & Mathematics · 01/10/2013

2. ### How can I show that tanA + 1/tanA = 2/sin2A ?

...1/tanA = cotA sin(2A) = 2 * sinA * cosA LHS tanA + cotA RHS 2/(2 sinA * cosA) =...

1 Answers · Science & Mathematics · 29/07/2009

3. ### Engineering Q - dimensional analysis/conversions?

... sign, try to make the right hand side (RHS) equal the left hand side (LHS). To start, just pick one variable for one side, and put the others on the...

2 Answers · Science & Mathematics · 11/09/2012

4. ### Could you explain how this current measurement circuit works?

...the transistor emitter current is I*Rs/100 (100 ohm resistor at top LHS of diagram.) For large current gains in the transistor, the collector current...

1 Answers · Science & Mathematics · 16/06/2015

5. ### show that the vector-valued function r(t) = e^-t costi + e^-t sintj + e^-tk lies on the cone z^2 = x^2 + y^2?

r(t) = e^-t costi + e^-t sintj + e^-tk This shows that point (x, y, z) is parametrically (e^-t cost, e^-t sint, e^-t) LHS= z^2= e^2t RHS= x^2 + y^2= e^2t( cos^2t + sin^2t )= e^2t So vector lies on cone

1 Answers · Science & Mathematics · 25/09/2014

6. ### Express A and B of equation y=Acos(wt) + Bsin(wt) in terms of R and d of equation Rcos(wt-d)?

... to perform it the other way round, i.e. starting from the LHS. A final point is notice that A^2+B^2=R^2((sin^2...

1 Answers · Science & Mathematics · 25/04/2013

7. ### In this problem we consider a differential equation in the form Mdx+ Ndy = 0.?

...sec(3x)*tan(3x) Since M_y is not equal to N_x, the LHS of the equation is not an exact differential, and some other method of solution woulld...

1 Answers · Science & Mathematics · 13/02/2014

8. ### mathematical induction?

...this to be true for k = 1 and k = k + 1 Consider k = 1 ------------------------ LHS = 3 RHS = 3 Thus true Consider k = k + 1...

1 Answers · Science & Mathematics · 18/05/2012

9. ### Can someone help me solve this? tan s is over 1+cos s + sin s is over 1-cos s = cot s + sec s csc S?

... tan⁡ s/(1+cos ⁡s )+ sin⁡ s/(1-cos ⁡s )=cot⁡ s+(sec⁡ s x csc ⁡s) LHS = tan ⁡s/(1+cos⁡ s )+ sin⁡ s/(1-cos ⁡s ) (tan⁡ s(1-cos⁡ s)+sin⁡ s(1+cos...

1 Answers · Science & Mathematics · 17/01/2012

10. ### Pressure and hydraulic head in an aquifer?

... acting) Stand pipe is up to datum [A] in LHS figure? Then the head will be 15 m at A [ If it is...

1 Answers · Science & Mathematics · 27/09/2011