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Mathematics

1 answer:

xenn [34]3 years ago

8 0

The answer should be -10

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Help I am very bad at math I need answers by tomorrow if you can help please do

d1i1m1o1n [39]

Answer:

Step-by-step explanation:

(a - b)(a +b) = a² - b²

1 - Sin² A = Cos² A

$LHS = \frac{1}{1- Sin A} + \frac{1}{1 + Sin A}\\\\= \frac{1*(1 + Sin A)}{(1- Sin A)(1 + Sin A)} + \frac{1*(1- Sin A)}{(1 + Sin A)(1- Sin A)}\\\\= \frac{1 + Sin A+ 1 - Sin A}{1^{2}- Sin^{2} A}\\\\= \frac{2}{1 - Sin^{2} A}\\\\= \frac{2}{Cos^{2} A}\\\\= 2 Sec^{2} A$

2) Sec² A - Tan² A = 1

$LHS = \frac{1}{Sec A - Tan A}\\\\=\frac{1*(Sec A + Tan A)}{(Sec A - Tan A)(Sec A + Tan A)}\\\\=\frac{Sec A + Tan A}{Sec^{2} A - Tan^{2} A}\\\\=\frac{Sec A + Tan A }{1}\\\\= Sec A + Tan A = RHS\\\\\\$

3) LHS = Cosec² A + Cot² A

= Cosec² A + Cosec² A - 1

= 2Cosec² A - 1 = RHS

$4) LHS = \frac{Sec A}{Cos A}- \frac{Tan A}{Cot A}\\\\ = Sec A*\frac{1}{Cos A}-Tan A*\frac{1}{Cot A}\\\\ = Sec A * Sec A - Tan A * Tan A\\\\= Sec^{2} A - Tan^{2} A \\\\= 1$

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3 years ago

The radian measure of an angle that is 25º 47' 31'' is _____.

givi [52]

The radian measure of an angle that is 25º 47' 31'' is D. .45 radians. This is the way how I've got the answer:
<span>25.7919*(pi/180) = 0.45 (approximately)</span>

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4 years ago

In the figure, p || q.

notsponge [240]

M<1=m<5= corresponding
m<2=m<6= corresponding
m<3=m<6= alternate interior
m<4=m<5= alternate interior
m<1=m<8= alternate exterior
m<2=m<7= alternate exterior
m<1=m<4= vertical
m<5=m<8= vertical
m<2=m<3= vertical
m<6=m<7= vertical

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3 years ago

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Which statement correctly describes the relationship between quadrilateral ABCD and quadrilateral A′B′C′D′ ? An x y coordinate p

Keith_Richards [23]

The answer is; "Quadrilateral ABCD is congruent to quadrilateral A′B′C′D′ because you can map quadrilateral ABCD to quadrilateral A′B′C′D′ using a translation 7 units to the right, which is a rigid motion."

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4 years ago

John is a quarterback. This year he completed 350 passes which is 70% of all the passes he attempt this year.

mel-nik [20]

Can you please say “thanks” bc I need help on my work and it’s not letting me please help me out I’m failing math

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3 years ago