3 years ago

Prove that sin(3x)/sin(x)·cos(x) = 4cos(x)-sec(x)

Mathematics

1 answer:

MatroZZZ [7]3 years ago

8 0

Here is a huge hint:

sin(3x) = 3 sin (x) - 4(sin x)^3

sec (x) = 1/sin(x)

Take it from here.

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Answer:

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Find the first four terms of the sequence given a1=31 and an+1=an−3

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Step-by-step explanation:

Given the formula

a(n+1)=an−3

The first term a(1) = 31

For the second term

a(2)

We have

a( 1 + 1) = a(1) - 3

a(2) = 31 - 3

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For the third term

a(3)

We have

a(2+1) = a(2) - 3

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For the fourth term

a(4)

That's

a(3+1) = a(3) - 3

a(4) = 25 - 3

a(4) = 22

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A circle has a circumference of 50.24 units. What is the radius of the circle?

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