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Why is the concept of 'rogue states' controversial?

The term 'rogue state' is often used to denote a state which presents a risk to international stability through its failure to adhere to both domestic and foreign policy norms. Domestically, rogue states may...
JB
5224 Views

Given that 9 sin^2y-2 sin y cos y=8 show that (tany - 4)(tany + 2)= 0

This question requires us to make use of the trigonometric identities tan(y)=sin(y)/cos(y) and sin^2y + cos^2y = 1 which are given in the formula sheet of the exam. Since we know that sin(y)/cos(y) can be su...
SG
Answered by Swetha G. • Maths tutor
5011 Views

How do I ensure my conclusion wraps up my essay well?

Conclusions can be critical to your overall mark and should never be rushed! The main aim of a conclusion is to bring together everything you have written to come to a judgement. Examiners love originality a...
GT
Answered by Georgina T. • English tutor
1899 Views

How do I know if a word needs a preposition and if so how can I tell which one to use?

As with English, prepositions aren't needed in every sentence, however many nouns, verbs and adjectives do require one. Remember: they will affect the rest of a sentence grammatically. However, we can talk a...
RM
Answered by Rachael M. • German tutor
2204 Views

What are some differences between RNA and DNA?

RNA is single stranded, whereas DNA is double stranded. RNA has a uracil base instead of DNA's thymine base. RNA has a ribose sugar, whereas DNA has a deoxyribose sugar.
HG
Answered by Holly G. • Biology tutor
1267 Views