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Gala2k [10]
3 years ago
9

If cos 60° = 1/2 and sin 60º = root 3/2 find cos 240° and sin 240".

Mathematics
1 answer:
Vesnalui [34]3 years ago
7 0

Answer:

cos 240 deg = -1/2   and   sin 240 = - root(3)/2

Step-by-step explanation:

if cos 60° = 1/2 and sin 60º = root 3/2 find cos 240° and sin 240".

we  know that  cos 240 =   cos  (60 + 180) =  - cos 60 =  - 1/2

cosine is negative when the angle is in the 3rd quadrant

sin 240 = sin (60 + 180) =  - root(3) /2

sine is also negative in the 3rd quadrant.

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if a minute hand on a clock turns 1 degree every minute, how many minutes have passed when it's 1/8 of the way around the clock?
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3 years ago
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Answer:

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Our interest equation is s(x) = (1.05)^(x - 1). This is actually a part of a bigger formula for calculating the amount of money accumulated including interest:

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Answer:

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