Module ·
Chapter 10: Trigonometry & Heights / Distances
Trigonometry
4 topics
What this chapter covers
The 4 topics below make up Trigonometry & Heights / Distances in the SSC CGL exam. Click any topic to open its notes, examples and practice test.
Study material & tests
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Formula Reference Sheet
This chapter
Ratios & identities
| Basic ratios | sin = opp/hyp, cos = adj/hyp, tan = opp/adj |
|---|---|
| Reciprocals | cosec = 1/sin, sec = 1/cos, cot = 1/tan |
| Pythagorean | sin^2 + cos^2 = 1 |
| Secant | 1 + tan^2 = sec^2 |
| Cosecant | 1 + cot^2 = cosec^2 |
Standard angles & H&D
| sin | 0, 1/2, 1/root2, root3/2, 1 (at 0,30,45,60,90) |
|---|---|
| cos | 1, root3/2, 1/root2, 1/2, 0 |
| tan | 0, 1/root3, 1, root3, undefined |
| Heights & distances | tan(angle of elevation) = height / horizontal distance |
SSC reference
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