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3 years ago

Help please, if you can

Mathematics

1 answer:

Xelga [282]3 years ago

3 0

Answer:

since i was helpfull i would like to answer another question fish swim in water

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Find sin(a+B)

diamong [38]

Answer:

Cos A=5/13

we have

Cos² A= $1-Sin ²A$

25/169=1-Sin²A

sin²A=1-25/169

sin²A=144/169

Sin A= $\sqrt{144/169}=12/13$

again

Tan B=4/3

P/b=4/3

p=4

b=3

h= $\sqrt{3²+4²}=5$

Now

Sin B=p/h=4/5

in IV quadrant sin angle is negative so

Sin B=-4/5

CosB=b/h=3/5

Now

Sin(A+B):sinAcosB+CosAsinB

now 

substitute value

Sin(A+B):12/13*3/5+5/13*(-4/5)=36/65-4/13

=16/65 is a required answer

6 0

3 years ago

Find the value of x and the value of y

Anestetic [448]

Answer:

Step-by-step explanation:

Since DE is parallel to AB and intersects the other 2 sides, it divides those sides proportionally, that is

$\frac{BE}{EC}$ = $\frac{AD}{DC}$

Note that AD = 33 - 22 = 11

Substitute values into the ratio

$\frac{x}{16}$ = $\frac{11}{22}$ = $\frac{1}{2}$ ( cross- multiply )

2x = 16 ( divide both sides by 2 )

x = 8

To find y use similar triangles

Δ ABC is similar to Δ DEC, thus ratios of corresponding sides are equal

$\frac{AB}{DE}$ = $\frac{AC}{DC}$ , substitute values

$\frac{18}{y}$ = $\frac{33}{22}$ = $\frac{3}{2}$ ( cross- multiply )

3y = 36 ( divide both sides by 3 )

y = 12

Thus y = 12, x = 8 → A

4 0

3 years ago

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Answer:

$600.60

Step-by-step explanation:

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The answer is 4x=24 because the next step is to add 4 to both sides

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A cylindrical container with radius 12 cm and height 7 cm is covered in paper. what is the area of the paper

alexandr1967 [171]

12x7 should give you your answer

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