Problem 84 of 7
Find a missing side using trig setup cos(45)=7/x.
Hints
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set proportion from sine/cosine/tangent.
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Use sine, cosine, or tangent ratio according to known and unknown sides.
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Solution
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1. Identify the trig ratio equation.
2. Isolate the unknown side.
3. Evaluate known trig values if given.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Swapping numerator and denominator without preserving equation.