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Zigmanuir [339]
3 years ago
5

Explain why cos(x)=sin(90-x) for x such that 0

Mathematics
1 answer:
aleksley [76]3 years ago
8 0
Use the sin(a - b) formula. 
<span>sin(90 - x) = </span>
<span>sin90 cosx - cos90 sinx = </span>
<span>1 cosx - 0 sinx = </span>
cosx
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