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alexandr402 [8]
3 years ago
11

Cos theta -2sin theta cos theta =0

Mathematics
1 answer:
antiseptic1488 [7]3 years ago
4 0
Cos(Ф) - 2sin(Ф).cos(Ф) =0

Factorize--> cos(Ф)[ 1-2sin(Ф)] =0

a) cos(Ф) = 0 ==> Ф= 0 or (0+2kπ)

b) 1-2sin(Ф) =0 ==> -2sin(Ф) = - 1 ==> sin(Ф) =1/2 Or

sin(Ф) = 1/2 ==> Ф =π/3 OR π/3 + (k+1)π/3
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(-7)(-5)= __ a0<br>solve the equation​
tatuchka [14]

Answer:

-7 x -5 = 35

Step-by-step explanation:

When you multiply two numbers with the same sign they will always equal positive.

Hope this helped :)

4 0
3 years ago
Find sin D sin E cos D and cos E
Andrew [12]

9514 1404 393

Answer:

  sin(D) = cos(E) = (√3)/2

  cos(D) = sin(E) = 1/2

Step-by-step explanation:

The mnemonic SOH CAH TOA is intended to remind you of the relationships between trig functions and right triangle sides.

  Sin = Opposite/Hypotenuse

  Cos = Adjacent/Hypotenuse

For this diagram, this means ...

  sin(D) = cos(E) = (13√3)/26 = (√3)/2

  cos(D) = sin(E) = 13/26 = 1/2

5 0
3 years ago
–9(w + 585) = –360 w = ______
vekshin1

Answer:

w = 15

Step-by-step explanation:

-9(w + 585) = -360w

-9w -5265 = -360w

351w = 5265

w=15

3 0
4 years ago
Read 2 more answers
the number m and 5/8 are additive inverses.drag and drop m to their correct positions on the number line.drag and drop the label
monitta

The additive inverse of a number is that number with its sign changed.

The additive inverse of 5/8 is -5/8, so that is the value of <em>m</em>.

The sum of a number and its additive inverse is <em>zero</em>. (This is actually the definition of <em>additive inverse</em>.)

5/8 is found at 5/8 on the number line.

m is found at -5/8 on the number line.

"sum" is found at 0 on the number line.

3 0
4 years ago
If i was born in 1999 how old would i be?
Tcecarenko [31]
Wouldn't you be 17 cause plus one is 2000 and then one plus 16 equals 17
6 0
4 years ago
Read 2 more answers
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