3 years ago

If cos45⁰=0.707 find cos(-45⁰)

1 answer:

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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If cos45⁰=0.707 find cos(-45⁰)​