The ratio of boys to girls at a movie is 4:7. If there are 21 girls, how many boys are at
1 answer:
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Answer:
sin(x) and cos(y) are equal and have ratio of 1 : 1
First find the missing hypotenuse using Pythagoras theorem:
a² + b² = c²
12² + 5² = c²
c = √144+25
c = 13
using sine rule:
using cosine rule: