The Pythagorean identities
Read exercise and reference answers
- Questions
- Question
- cos²x + sin²x equals
- Choices
- 0
- 1
- 2
- Correct choice
- 1
- Question
- 1 + tan²x equals
- Choices
- cosec²x
- cot²x
- sec²x
- Correct choice
- sec²x
- Question
- 1 + cot²x equals
- Choices
- cosec²x
- sec²x
- tan²x
- Correct choice
- cosec²x
- Question
- Which identity involves cosec?
- Choices
- 1 + tan²x
- 1 + cot²x
- cos²x + sin²x
- Correct choice
- 1 + cot²x
Straight recall of the three. Source: syllabus Maths, Ch 3 Trigonometric Functions.