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3 years ago

Write the equation for the inverse of the function. y= cos(x - pi/2)

Mathematics

1 answer:

Mama L [17]3 years ago

4 0

Answer:

$f^{-1}(x)=\cos^{-1}(x)+\pi/2$

$\text{or}\ f^{-1}(x)=\pi - \sin^{-1}(x)$

Step-by-step explanation:

Basic definition of inverse.

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Choose the expression which represents the simplest form of (-4x2)

Lelechka [254]

Answer:

Step-by-step explanation:

No idea

7 0

3 years ago

Complete the table by providing justification for each step of the proof

exis [7]

4(x² - 2) = 28

1. Distribute the 4
4x² - 8 = -28

2. Plug in 3 and -3
4(3)² - 8 = 28
4(-3)² - 8 = 28

3. Square 3 and -3
4(9) - 8 = 28
4(9) - 8 = 28

28 = 28

The reason both answers are the same is because whenever you put a negative number to an even power, the result becomes positive because any negative multiplied by a negative number is always positive.
28 = 28

5 0

3 years ago

What is the vaule of 12(3x+5x),when x=7

german

Fist plug in 7 in to the X values like so 12 (3 (7) +5 (7)) then solve in side the parenthesis 3×7 =21 and 5×7=35 then add them 35+21=56 and then you are left with 12(56) or 12×56= 672

8 0

3 years ago

0.4% of 100<br><br><br> Please help

mylen [45]

0.4% of 100 is .4 whoops i thought it was 0.4 as a decimal :P

6 0

3 years ago

Read 2 more answers

Solve the simultaneous equation 2x+5y=6 and 5x-2y=9

Ilia_Sergeevich [38]

Answer:

$x = \frac{57}{29} \ , \ y = \frac{12}{29}$

Step-by-step explanation:

2x + 5y = 6 --------( 1 )

5x - 2y = 9 --------( 2 )

_____________

( 1 ) x 5 => 10x + 25y = 30 -----------( 3 )

( 2 ) x 2 => 10x - 4y = 18 ----------- ( 4 )

______________

( 3 ) - ( 4 ) => 0 + 29y = 12

$y = \frac{12}{29}$

Substitute y in ( 1 ) =>

$2x + (5 \times \frac{12}{29}) = 6\\\\2x + \frac{60}{29} = 6\\\\2x = 6 - \frac{60}{29}\\\\2x = \frac{174 - 60}{29}\\\\x = \frac{114}{29 \times 2}\\\\x = \frac{57}{29}$

4 0

3 years ago