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solve the equation 2cos x=3tan x, for 0°<x<360°

We know that tan x =sin x/cos x, so we can multiply the whole equation by cos x which gives us =&gt; 2cos^2 x =3 sin x from the trig identity sin^2 (x)+ cos^2 (x)=1, we can sub in cos^2 (x)=1-sin^2(x) =&gt; ...
EG
Answered by Elizabeth G. • Maths tutor
21766 Views

Show 23/7 as a mixed number.

23/7 = (21+2)/7 = (3*7+2)/7 = 3 2/7
SC
Answered by Sian C. • Maths tutor
8644 Views

Factorise x^3+3x^2-x-3

Test factors of -3 to find a root for the equation. For example, try 1, 1^3+3*1^2-1-3=0, so 1 is a root, and (x-1) is a factor. Now it's known that: (ax^2+bx+c)(x-1)=x^3+3x^2-x-3. By comparing coefficients f...
SC
Answered by Sian C. • Maths tutor
7865 Views

Give the full balanced symbol and word equation for aerobic respiration

glucose + oxygen --&gt; energy + carbon dioxide + water C6H12O6 + 6O2 ---&gt; energy + 6CO2 + 6H20
JV
Answered by Justine V. • Biology tutor
12351 Views

How does the preceding direct object pronoun affect past participles in the following clause

The past participle agrees with the number and gender of the PDO with nothing added for masculine singular words, -e for feminine singular words, -s for masculine plural and -es for feminine plural E.g. Le m...
LR
Answered by Lorna R. • French tutor
2279 Views