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Express 2Cos(a) - Sin(a) in the form RCos(a+b) Give the exact value of R and the value of b in degrees to 2 d.p.

R = 50.5

b = 26.57 degrees

WF
Answered by William F. Maths tutor
4887 Views

Explain how the electron pair repulsion theory can be used to deduce the shape of, and the bond angle in, PF3 .

Number of electrons from P= 5 e , Number of electrons from 3F = 3 e , Total number of electrons around P = 8 e Therefore there is a total number of 4 electron pairs surrounding P. three of which are bond ...

YA
Answered by Yusuf A. Chemistry tutor
3541 Views

I'm struggling with structuring my essays. Have you got any advice on this?

The structure of your essays in History, and other humanities subjects, during A-Level will be important in determining your grade so its appropriate to ensure your structure is logical, and coherent. You...

DT
Answered by David T. History tutor
2571 Views

How to find the reciprocal of a graph, such as y=cos(x)?

To find the reciprocal of any graph, first consider the key points, in this case: (0,1), (90,0), (180,-1), (270,0) and (360,1). Since we are finding the reciprocal in the y-axis, we can find the reciproca...

AA
Answered by Aqeel A. Maths tutor
5334 Views

Explain the difference between Libetarianism and Hard Determinism. Discuss which is the stronger argument.

Libertarianism is the claim that human individuals have autonomous control over their actions, and are, therefore, morally accountable agents. Hard determinism, on the other hand, claims that an individua...

OK
10870 Views

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