True or false about trigonometry

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   cosec A is the reciprocal of sin A.

2. Statement is true

   No

   Statement

   cos A means cos multiplied by A.

3. Statement is true

   Yes

   Statement

   sin squared A plus cos squared A equals 1.

4. Statement is true

   Yes

   Statement

   Trigonometric ratios need a right triangle.

5. Statement is true

   No

   Statement

   An identity holds only for one angle.

Instructions

Decide whether each statement is true or false.

Explanation