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Square both sides:


Since

is positive, you can discard the negative sign. So,

Substitute this value back into

to find


I hope this helps. =)
Tags: <em>trigonometric identity relation trig sine cosine tangent sin cos tan trigonometry precalculus</em>
Answer: i'm pretty sure it's 38,500
Step-by-step explanation:
Area= length * height
21*9 = 189cm^2
Answer:
I don't know anything sorry for inconvenience