Introduction to Trigonometry

Trigonometric ratios and identities for upper-primary level.

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Q1 · Introduction to Trigonometry · EASY
In a right-angled triangle ABC, right-angled at B, if AB = 3 cm and BC = 4 cm, what is the value of sin C?
Q2 · Introduction to Trigonometry · MEDIUM
If cos A = 12/13, what is the value of tan A? (Given that angle A is acute)
Q3 · Introduction to Trigonometry · MEDIUM
In triangle PQR, right-angled at Q, if PQ = 7 cm and PR = 25 cm, what is the value of cos P + sin R?
Q4 · Introduction to Trigonometry · HARD
If sin θ + cos θ = √2, what is the value of sin θ × cos θ? (θ is an acute angle)
Q5 · Introduction to Trigonometry · MEDIUM
If tan θ = 3/4 and θ is an acute angle, what is the value of sin θ?