3 years ago

3x2 + 5x-9 = 0 Quadratic formula A= B= C=

Mathematics

2 answers:

Umnica [9.8K]3 years ago

5 0

Answer:

the answer are

a = 3, b

= 5 and

c = -9

kaheart [24]3 years ago

5 0

Answer:

The answer is in the photo below! :D

Step-by-step explanation:

Hope this helped!

-LEI

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2 years ago

TRIGONOMETRY , can you solve this plz:(<br>even if you know one of them,plz help:)

daser333 [38]

Answer:

See below

Step-by-step explanation:

$\frac{1}{1-cos A} - \frac{1}{1+cos A} =2 cosec A cot A \\ \\ L. H. S.= \frac{1}{1-cos A} - \frac{1}{1+cos A} \\ \\ = \frac{1+cos A - (1 - cos A)}{(1-cos A)(1+cos A)}\\ \\ = \frac{1+cos A - 1 + cos A}{1-cos^{2} A}\\ \\ = \frac{2cos A }{sin^{2} A}\\ \\ =2 .\frac{1}{sin A}.\frac{cos A }{sin A}.\\ \\ = 2.cosec \: A.cot \: A \\ \\ = R.H.S$