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aleksklad [387]
3 years ago
15

Simplify the expression using the appropriate identities. (Do not use calculator)

Mathematics
1 answer:
bezimeni [28]3 years ago
6 0

Answer:

sin -1 degrees.

Step-by-step explanation:

sin (A - B) = sin A cos B - cos A sin B

Therefore  sin 9° cos 10°- cos 9º sin 10° = sin (9 - 10)

= sin -1 degrees.

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