Question
Download Solution PDFIf A is an acute angle, the simplified form of
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept used:
Formula used:
- cos (π - θ) = - cos θ
- cot (90 + θ) = - tan θ
- cos (-θ) = cos θ
- tan (π + θ) = tan θ
- tan (3π/2 + θ) = - cot θ
- sin (2π - θ) = - sin θ
Calculation:
By using the above formula
⇒
But, cos θ / sin θ = cot θ
⇒ cot A. cos A/ cot A
⇒ cos A
∴ The correct answer is cos A.
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