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Show that: [sin(2a)] / [1+cos(2a)] = tan(a)

We start by expanding out the double trigonometric terms (sin(2a)) using the double angle formula, giving us: [2sin(a)cos(a)] / [1+cos^2(a) - sin^2(a)]. Next we spot that on the denominator (bottom half o...

GH
Answered by George H. Maths tutor
9447 Views

Why doesn't chlorine form hydrogen bonds even though it is more electronegative than nitrogen?

Chlorine has a higher electronegativity, but as it has a large atomic radius the electron density is spread out over a large area. This means that the electron density is too low to form proper hydrogen b...

CL
Answered by Callum L. Chemistry tutor
18055 Views

What does it mean when I get a negative value when I do a definite integral?

The definite integral gives the value of the area bounded between the curve at the given limits, and the x-axis (if we are integrating with respect to x!) If this value is negative, it means that the area...

CL
Answered by Callum L. Maths tutor
16028 Views

How can I discuss the structure of a poem?

Structure says a lot about the poets intentions of the poem, and how they wished the poem to be read. 

Short, sharp lines, with long continuous stanzas suggest a pace to the poem. Whereas longer li...

JW
19767 Views

How do you conjugate in present tense?

(PLEASE NOTE I WOULD PRESENT THIS IN A TABLE FORMAT DURING THE TUTOR SESSION)

Yo (Me)

  • AR= O

  • ER= O

    ...
JW
Answered by Jenna W. Spanish tutor
1425 Views

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