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Mathematics
Hadassah Bradley
28 April, 15:41
Explain why (cos ((theta)) ? + (sin ((theta)) 2 = 1
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Ariel Rivers
28 April, 17:08
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Imagine a right triangle where a and b are the legs and c is the hypothenuse.
Pitagora: a²+b²=c²
Divide by c
(a/c) ² + (b/c) ²=1
But a/c=sin (B) and b/c=cos (B)
Thus sin² + cos² = 1
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