SOLUTION: Use your calculator to check that a) cos 0.8 = - cos ( π - 0.8) b) sin 1 = cos(π/2 - 1) Can you please help me ? Thanks so much in advance:)

Question 878810: Use your calculator to check that
a) cos 0.8 = - cos ( π - 0.8)
b) sin 1 = cos(π/2 - 1)
Can you please help me ? Thanks so much in advance:)
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
It seems you're in a trig class, but you have no clue.
Get out of it.
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SOLUTION: Use your calculator to check that a) cos 0.8 = - cos ( &#960; - 0.8) b) sin 1 = cos(&#960;/2 - 1) Can you please help me ? Thanks so much in advance:)

SOLUTION: Use your calculator to check that a) cos 0.8 = - cos ( π - 0.8) b) sin 1 = cos(π/2 - 1) Can you please help me ? Thanks so much in advance:)