Same chapter3 marksDifficulty: Medium
Prove that sin2θ + cos2θ = 1 for an acute angle θ.
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3 marksDifficulty: Medium
If tan θ = 3/4, find sin θ and cos θ for an acute angle θ.
Original Khojo Papers practice question — not from a past board paper.
Answer
sin θ = 3/5 and cos θ = 4/5
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The hypotenuse is √(32 + 42) = 5, so the sine is 3/5 and the cosine 4/5.
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