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iragen [17]
2 years ago
5

What is the identity of cos 2 θ

Mathematics
1 answer:
kiruha [24]2 years ago
7 0

Using the cosine double-angle identity. The cosine double angle formula tells us that cos(2θ) is always equal to cos²θ-sin²θ.

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ASAP HELP HIGH POINTS <br> find the value of x.
Westkost [7]

Answer:

x ≈ 4.2 (nearest tenth)

Step-by-step explanation:

The chord of length 4 is the base of an isosceles triangle with height of 3.7 and sides equal to the radius (x).

An isosceles triangle comprises two right triangles, each with:

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  • hypotenuse = x units

Therefore, to find x use Pythagoras' Theorem:  a² + b² = c²

(where a and b are the legs, and c is the hypotenuse, of a right triangle)

⇒ a² + b² = c²

⇒ 2² + 3.7² = x²

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⇒ x = √(17.69)

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dolphi86 [110]

Answer:

12:00 i think

Step-by-step explanation:

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3 years ago
Delilah does 841 jumping jacks in 4 minutes. She does her jumping jacks at a constant rate. How many jumping jacks can Delilah d
STatiana [176]

841 jumping jacks per 4 minutes

\frac{841~jumping~jacks}{4~minutes}

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marysya [2.9K]
'Pi' ( π ) is the ratio of the circumference of a circle to its diameter.

The exact value of 'pi' can't be completely written with numbers, so whenever
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V = 6 x 6 x 8

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