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Neporo4naja [7]
3 years ago
8

Prove the following identity. sin 3θ = 3 sin θ − 4 sin3 θ

Mathematics
1 answer:
jarptica [38.1K]3 years ago
5 0
I'll work in x because I'm on my phone.

Proof: LHS = sin3x = sin(2x + x)
= sin2x cosx + cos2x sinx
= 2sinxcos^2x + cos^2x sinx - sin^3x
= 2sinx (1 - sin^2x) + sinx (1 - sin^2x) - sin^3x
= 2sinx - 2sin^3x + sinx - sin^3x - sin^3x
= 3sinx - 4sin^3x = RHS
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The youth group is going on a trip to the state fair. The trip costs $63. Included in that price is $13 for a concert ticket and
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Ok,

The total is 63$:

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It shows us one of the numbers for the equation, 13

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the price of the pass is unknown, so we can use a variable to figure it out:

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47:47
BARSIC [14]

Sorry, I'm not sure.

I would suggest asking a trusted adult or teacher or redoing the lesson. Cheating isn't a good path: you will not do well in the future if you always search for answers on the internet.

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2 years ago
Find the measure of angle ABC
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