If and with acute angles and , what is the measure of ?
Answer and explanation
Correct answer: A.
- Step 1: Use the tangent addition identity: .
- Step 2: Substitute the given values: .
- Step 3: Since , the sum . The unique acute angle with tangent equal to is .
Answer
.
Why not the others: corresponds to tangent ; corresponds to tangent ; corresponds to undefined tangent.
Practise more Trigonometric functions and inverse trigonometric functions.
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