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To help explain we will use the following example: Show that cos(2x) = 2cos 2 x - 1. Hence solve the equation cos(2x) + cosx = 0 for 0 o < x < 360 o . Answer: We know from our sum-difference formulas t...

First: Start with a comparison with English (different tenses for the present in English vs. A single one in German) Second: Evoke the difference between strong and weak verbs in German, do a parallel with E...

The best way to memorise all the grammatical exceptions in the Russian language is obviously to practice them. However, it is also very helpful to write a small paragraph with sentences including all the exc...

(NOTE: This is an "evaluate" question so make sure to have a counterpoint i.e. HOWEVER...) Labour productivity = output per worker over a period of time (e.g. 2 cars a day). Labour productivity has...

regular forms take the verb --> form in the 'they' version of the preterite --> remove the ending --> add imperfect subjunctive endings -ER AND -IR verbs yo] - iera tú] -ieras él/ella/usted] -iera n...