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3 years ago

CosX sec^2X tanX - cosX tan^3X = sinX

1 answer:

4 0

$\cos x\sec^2x\tan x-\cos x\tan^3x=\cos x\tan x\left(\sec^2x-\tan^2x\right)=\sin x\left(\sec^2x-(\sec^2x-1)\right)=\sin x$

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3 years ago

Guys I really need help plsss

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Answer:

x = 3

Step-by-step explanation:

Multiply the first equation by -1, then add it to second equation.

2x+9y = -12

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2y = -4

Solve for y

2y = -4

y = -2

Plug value of y into one of the equations and solve for x

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3 years ago

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postnew [5]

<h2>Answer:</h2><h2>Yes, the simplified form of 2 square root of 3 − 2 square root of 3 is rational.</h2>

Step-by-step explanation:

The given expression is $2 \sqrt{3} - 2 \sqrt{3}$

After performing the subtraction operation, the result is 0 as the terms are equal and opposite in sign, they cancel each other.

Rational numbers are those which can be expressed in the form of fractions, decimals, e.t.c

Since 0 can be expressed as a fraction, it is a rational number.

For eg: $\frac{0}{2}$ = 0,

Hence the result of the given expression is a rational number.

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3 years ago

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