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cricket20 [7]
3 years ago
11

If cos45⁰=0.707 find cos(-45⁰)​

Mathematics
1 answer:
maksim [4K]3 years ago
6 0

Answer:

0.707

Step-by-step explanation:

cos in the 4th quadrant is positive as well as in 1st quadrant.

cos(-45°) is in the 4th quadrant.

So cos40° must equal cos(-45°) which is 0.707.

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