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2 years ago

amina bout an air cooler for a AED 3300 including VAT of 5% find the price of the air cooler before VAT was added

Mathematics

1 answer:

Olenka [21]2 years ago

8 0

Cost of air cooler:-3,300
vat added:- 5%
so, price before vat was added:-5/100×3,300=AED165

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Trigonometric Ratios

The ratios between the sides of a right triangle are called trigonometric ratios.

If any of the acute angles is chosen as a reference, it has an adjacent side and an opposite side. The trigonometric ratios are defined upon those sides and the hypotenuse.

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Can someone help me with this two column proofs? -this one is confusing to me

Shalnov [3]

Perpendicular bisectors have a particular property: if AB is a perpendicular bisector of CD, then every point lying on AB has the same distance from C and D.

In your case, we have that every point lying on AC has the same distance from B and D.

So, in particular, we have EB=ED, because E lies on AC.

Moreover, since AC is a perpendicular bisector, it is the height of the triangle (if we choose BD as base), and it bisects BD: this means that the triangle is isosceles, so AD=AB.

This means that triangles ABE and ADE have:

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So, their sides are all equal, and thus they are congruent.

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