Same chapter3 marksDifficulty: Medium
Prove that sin2θ + cos2θ = 1 for an acute angle θ.
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3 marksDifficulty: Medium
If sin A = 5/13 and A is acute, find cos A and tan A.
Original Khojo Papers practice question — not from a past board paper.
Answer
cos A = 12/13 and tan A = 5/12
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The third side is √(132 − 52) = 12, so the cosine is 12/13 and the tangent 5/12.
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