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Given that 2cos(x+50)°=sin(x+40)° show tan x° = tan 40°/3

The formulae for the sum the sine and cosine of two angles are: 2(cos x°cos 50°- sin x°sin 50°)= sin x°cos 40°+cos x°sin 40°cos 50°= sin 40°sin 50° = cos 40° Therefore, 2 cos x°sin 40°- 2 sin x°cos 40° = sin...
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Answered by Prashasti T. • Maths tutor
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‘Transnational corporations only have a positive impact when extracting resources from host countries’. To what extent do you agree with this view?

Introduction: Transnational corporations (TNCs) are organisations which operate in multiple countries through foreign direct investment, offshoring of resources and/or outsourcing of labour. In terms of the ...
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Answered by Luke F. • Geography tutor
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Integrate x * sin(x) with respect to x by using integration by parts

The general formula for integration by parts to integrate something of the form u * v' is: u * v - (integral)[ (u' * v) dx ] . Thus we first need to write x * sin(x) in the form u * v' . Lets pick u = x and ...
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Answered by Jamie W. • Maths tutor
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In 2012, two scientists were awarded the Nobel prize for their research on stem cells. They showed that adult cells could be reprogrammed to become cells with the properties of embryonic stem cells. Describe the possible benefits of this research.

No need to use ESC.No rejection.Use to replace diseased cells by reprogramming and give rise to any cell type.
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Answered by Georgia S. • Biology tutor
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Can you explain the main events that happen during an action potential?

What is an action potential? When a stimulus of sufficient size is detected, it causes a temporary reversal of charges either side of the axon membrane. It also causes the channels in the axon membrane to ch...
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Answered by Dominique N. • Biology tutor
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