Question

In which answers is the value of this expression equal to 1?
cos180°
sin0°
sin245°−cos245°
−sin90°
−cos180°
sin245°+cos245°
cos90°
sin90°

Answer 1

Answer:

-sin90

Step-by-step explanation:

the answer is minus sin 90 degree plus minus cos 90 degree

Answer 2

sin 90°

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