3 years ago

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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Evaluate the expression for x = 3 y= 1/3 and z= 5. 12 x - 3y / 4 x - Z

4vir4ik [10]

Answer:

Step-by-step explanation:

12 x - 3y / 4 x - Z

=12×3-3×1/3÷4×3-5

=36-1/12-5

=35/7

So the final answer is 5.

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3 years ago

A game room has a floor that is 125 feet by 30 feet. A scale drawing of the floor on grid paper uses a scale of 3 units:5 feet.

crimeas [40]

It would be 75 units in length and 18 units in width.

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2 years ago

Given the angles inscribed in the circle, find m ∠ DBC.

Cloud [144]

Answer:

m∠DBC = 51°

Step-by-step explanation:

Circle Theorem vocabulary

Chord: A straight line joining two points on the circle.
Inscribed angle: The angle formed when two chords meet at one point on a circle.
Intercepted arc: The arc that is between the endpoints of the chords that form the inscribed angle.

Inscribed Angle Theorem

The measure of an inscribed angle is half the measure of the intercepted arc.

Therefore:

$\sf \implies \angle DBC=\dfrac{1}{2}\:\overset{\frown}{BC}$

$\sf \implies \angle DBC=\dfrac{1}{2}\:(102^{\circ})$

$\sf \implies \angle DBC=51^{\circ}$

Learn more about the Inscribed Angle Theorem here:

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Alenkasestr [34]

Fico is a credit score - true
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I don't think my answer is correct but I hope it helped you :)

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Question 26 y What is y when x is 33? ROUND YOUR ANSWER TO THE NEAREST HUNDRETH.

Katarina [22]

Answer:

y = 4.13

Step-by-step explanation:

Plux in x = 33 into y = 1/8x.

y = 1/8(33)

y = 4.125

Round to the nearest hundreth.

y = 4.13

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2 years ago