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What is an infinitive and when is it used?

An infinitive is a verb that has not been changed and is in its original form, eg with an -re, -er or -ir ending , meaning “to …”. An infinitive is commonly found: As a second verb (particuraly after verbs a...
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Answered by Olivia M. • French tutor
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What is a ritornello form?

The ritornello form was one of the musical structures developed in the Baroque period. It is characterised by a recurring A section in between new sections of music, and is often described as 'ABACA', where ...
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Answered by Sapphire A. • Music tutor
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What are the disadvantages and advantages of economic growth?

GRUBBES Pros - Higher income tax SO less of a budget deficit, more public funding which could increase AS and reduce Y inequality Evaluate: Laffer curve, LT increase, little evidence it does (depends on what...
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Answered by Abi C. • Economics tutor
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Unsaturated fats change bromine water from orange to colourless. How?

Unsaturated fats usually have a C=C double bond, e.g. vegetable oil. So, it's 'unstable' because of the high concentration of negative charge (electrons). Bromine (B2) is not polarised. However, as it approa...
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Answered by Abi C. • Chemistry tutor
10192 Views

Differentiate sin(5x) and 3cos(x) and 3tan(5x)

sin cos -sin -cos (down is differentiate and up is integrate) so, y = sin5x dy/dx = 5cos5x y=3cox dy/dx = -3sinx y=3tan5x dy/dx = 15sec 2 (5x) (remember sec(x) is the reciprocal of cos(x))
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Answered by Abi C. • Maths tutor
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