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Luden [163]
3 years ago
14

TEN POINTS!!!

Mathematics
2 answers:
Zina [86]3 years ago
8 0

Answer:

Option d- 2 sin2x - 2 sin x cos x - 1

Step-by-step explanation:

the trigonometry identities are useful in this case.

Let the identity be:

Sin 2x = 2 sinx cosx

Cos 2x = 2cos²x - 1

Substituting gives:

2 sinx cosx - (2cos²x - 1)

cosx (2sin x - cosx) + 1

solving gives:

2 sin2x - 2 sin x cos x - 1

timofeeve [1]3 years ago
4 0

it is d hopefully this is helpful

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