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egoroff_w [7]
3 years ago
11

Sin2x + cos3x expand the expression

Mathematics
1 answer:
Maru [420]3 years ago
8 0

Step-by-step explanation:

Use double and triple angle identities:

sin(2x) + cos(3x)

2 sin x cos x + 4 cos³x − 3 cos x

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{4x+10y=8<br>{4x+3y=22<br><br>x=<br>y=​
Damm [24]

Answer: X=7

              Y=-2

Step-by-step explanation:

Please can i get brainliest

8 0
3 years ago
Which value of b would make 16x²-bx + 25 a perfect square trinomial?
blondinia [14]

Answer:

b = 40 and -40

Step-by-step explanation:

General form of Perfect square trinomial is a 2 + 2 a b + b 2

Therefore from 16 x 2 − b x + 25 a 2 = √ 16 x 2 , b 2 = 25 , then a = ± 4 x , b = ± 5 take consideration a=4x and b=-5 (different sign), then − b x = 2 ( 4 x ) ( − 5 ) − b x = − 40 x b = 40

The perfect square is ( 4 x − 5 ) 2 = 16 x 2 − 40 x + 25 .

if we consider a=4x and b=5 (same sign), then − b x = 2 ( 4 x ) ( 5 ) − b x = 40 x b = − 40

The perfect square is ( 4 x + 5 ) 2 = 16 x 2 + 40 x + 25 .

The first solution ( 4 x − 5 ) 2 is the best solution after comparing the expression given.  I hope this helps, xx .

8 0
3 years ago
Given that log3(z - 1) - logz z = 1+ 3 log3 y, express z in terms of y.
fgiga [73]

Answer:

  z = 1 + 9y³

Step-by-step explanation:

It looks like you have ...

  \log_3{(z-1)}-\log_z{(z)}=1+3\log_3{(y)}\\\\\log_3{(z-1)}-1=1+\log_3{(y^3)}\\\\\log_3{(z-1)}=2+\log_3{(y^3)}\qquad\text{add 1}\\\\z-1=(3^2)(y^3)\qquad\text{take antilog}\\\\\boxed{z=1+9y^3}\qquad\text{add 1}

6 0
3 years ago
Solve for m.
Alenkasestr [34]

Answer:

m = 96

Step-by-step explanation:

96 divided by 8 is 12.

Hope this helps!

6 0
3 years ago
Read 2 more answers
Please answer I need help badly kinda slow
Keith_Richards [23]

Answer:

The answer is 380.

5 0
2 years ago
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