Pls answer this and thank you very much

Mathematics

2 answers:

Colt1911 [192]3 years ago

8 0

Answer:

1. B) -5/12

Step-by-step explanation:

Because -2 x 5 = -10

-10 + 2 = -12

Keep and change

-5/12 --> -12/5

iVinArrow [24]3 years ago

6 0

Answer:

Step-by-step explanation:

Multiplicative inverse is the opposite of the number. For example, the multiplicative inverse of 7 is 1/7.

To get the multiplicative inverse we first have to turn -2 2/5 into an improper fraction.

Which is -12/5 now flip it to get the (MI) which is -5/12

Which equals 1

YOU'RE RIGHT!!

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3 0

3 years ago

1+cos2A/cos2A = tan2A/tanA prove LHS=RHS

son4ous [18]

$RTP: \frac{1 + cos(2A)}{cos(2A)} = \frac{tan(2A)}{tan(A)}$

$LHS = \frac{1 + cos(2A)}{cos(2A)}$
$= \frac{1 + \frac{1 - tan^{2}(A)}{1 + tan^{2}(A)}}{\frac{1 - tan^{2}(A)}{1 + tan^{2}(A)}}$
$= \frac{\frac{1 + tan^{2}(A) + 1 - tan^{2}(A)}{1 + tan^{2}(A)}}{\frac{1 - tan^{2}(A)}{1 + tan^{2}(A)}}$
$= \frac{2}{1 - tan^{2}(A)}$
$= \frac{2}{1 - tan^{2}(A)} \cdot \frac{tan(A)}{tan(A)}$
$= \frac{\frac{2tan(A)}{1 - tan^{2}(A)}}{tan(A)}$
$= \frac{tan(2A)}{tan(A)}$
$= RHS$ , as required.