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The triangle ABC is such that AC=8cm, CB=12cm, angle ACB=x radians. The area of triangle ABC = 20cm^2. Show that x=0.430 (3sf)

From the equation of the area of a triangle,
Area = 1/2 ACCBsin(C)
20 = 1/2 * 8 *12 * sin(x) 
=> sin(x) = 0.416666...
=> x = 0.430 to 3sf

LD
Answered by Laura D. Maths tutor
6723 Views

A bag contains 12 bals of different colours: 5 red, 4 blue and 3 yellow. What is the probability of not selecting a red ball

The probability of an event not happening is 1 minus the probability of the event happening. Five of the twelve balls are red so the probability of selecting a red ball is 5/12. The probability of not sel...

LD
Answered by Laura D. Maths tutor
7949 Views

How do I use PQA?

PQA stands for 'point, quote, analysis'. In a literary text, you may be asked to highlight the features which strenghten your essay's argument. To do so, it is best to first:

1) State the...

SF
Answered by Sophie F. English tutor
20241 Views

When would I use the conditionnel tense?

The conditionnel is used either as a form of politesse, to express a wish, to express a possibility, or an action completed with a condition. 

SF
Answered by Sophie F. French tutor
2538 Views

What does Avogadro's number mean?

Avogadro's number is simply used as a way of telling us how much of a substance we have. 

The number is 6.022 x 1023, and if we have that number of particles, we can make it ea...

KF
26614 Views

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