Trigonometry is a branch of mathematics that deals with the relationship between the angles and the sides of a right-angled triangle. The word comes from Greek, where ‘trigon’ means triangle and ‘metron’ means measurement.
In Class 10, you learn about the three main trigonometric ratios:
- Sine (sin)
- Cosine (cos)
- Tangent (tan)
and their reciprocals: cosec, sec, cot.
These ratios help in finding missing sides and angles of right triangles and are widely used in real life—for example, in measuring heights of towers, distances of objects, navigation, astronomy, architecture, and even in engineering.
Question : If tanθ+cotθ=2, find the value of sin2θ+cos2θ.
- 0
- -1
- 1
- 2
Answer : 1
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