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Using trigonometric identities, show that (cos(x) + sin(x))^2=1+sin(2x)

First being by expanding the brackets of the formula on the left: (cos(x) + sin(x)) 2 = (cos(x) + sin(x))*(cos(x) + sin(x)) = cos 2 (x)+2cos(x)sin(x)+sin 2 (x).Now we must use our understanding of trigonomet...
Answered by • Maths tutor
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Explain how the carbon is recycled into the growth of new leaves

Microorganism decompose the lead leaves from the old tress. They break up the leaves and release the nutrient and carbon into the environment. the new leaves photosynthesis and use the Carbon that was broken...
GC
Answered by Glen C. • Biology tutor
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differentiate tanx

tanx = sinx/cosxapply the quotient rule use the identity cos^x + sin^x = 1 to simplify
AM
Answered by ayaz m. • Maths tutor
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When do I use the subjunctive in French?

The subjunctive form is gradually becoming less common in French, however it is important to be able to recognise this mood in writing. Its formation is simple:take the third-person present plural form of th...
SS
Answered by Stephen S. • French tutor
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How do I conjugate regular -er verbs in the present tense?

Take a verb, such as "jouer".2) Drop the "-er" to leave "jou"3) Conjugate as follows:Je - add eTu - add esIl/Elle - add eVous - add ezNous - add onsIls/Elles - add ent4) Practic...
LC
Answered by Lowri C. • French tutor
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