Math, asked by nileshude9, 5 months ago

Prove the following.
cos( -7 -x) cos(-7-y) – sin( -5 -x) sin( 5-)
= - cos (x+y)​

Answers

Answered by Shaileshkumaryadav12
0

Answer:

sguxhjclrrt6ygkkkk

Step-by-step explanation:

sgoknfofjkojdaflj

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