3 years ago

Please help look at the picture attached need answers ASAP

Mathematics

1 answer:

Mandarinka [93]3 years ago

7 0

12x+6y=9 ->> y=-2x+3/2

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alexandr402 [8]

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4 years ago

Prove the identity secxcscx(tanx+cotx)=2+tan^2x+cot^2x

svetlana [45]

Hello,

$sec(x)= \dfrac{1}{cos(x)} \\

cosec(x)= \dfrac{1}{sin(x)} \\

sec(x)*cosec(x)*(tg(x)+cotg(x))=\dfrac{1}{cos(x)}* \dfrac{1}{sin(x)}*( \frac{sin(x)}{cos(x)} +\frac{cos(x)}{sin(x)})\\

= \dfrac{sin^2(x)+cos^2(x)}{sin^2x*cos^2x} \\

= \dfrac{1}{sin^2x*cos^2x} \\

$
==============================================================
$2+tg^2(x)+cotg^2(x)=2+ \dfrac{sin^2x}{cos^2x} + \dfrac{cos^2x}{sin^2x} \\

=2+ \dfrac{sin^4x+cos^4x}{sin^2x*cos^2x} \\

=\dfrac{2*sin^2x*cos^2x+sin^4x+cos^4x}{sin^2x*cos^2x} \\

= \dfrac{(sin^2x+cos^2x)^2}{sin^2x*cos^2x}} \\

= \dfrac{1}{sin^2x*cos^2x}} 
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8 0

4 years ago

Read 2 more answers

Its 3 questions plz answer I really need it.

hammer [34]

Answer:

Step-by-step explanation:

6 0

2 years ago

Log x ( 3 ) = 1/4 what is log x 9

maksim [4K]

log x 9 = log x (3)² = 2log x ( 3 ) = 2×1/4 =1/2