Working alone, students use question words in a box to complete questions on their worksheet. When the students have completed the questions, check the answers with the class. Students then take it in turns to ask the questions to their partner.

Mossberg 183d partsIn this triangle, the shortest leg ( x) is √ 3, so for the longer leg, x √ 3 = √ 3 * √ 3 = √ 9 = 3. And the hypotenuse is 2 times the shortest leg, or 2 √ 3) And so on. The side opposite the 30° angle is always the smallest, because 30 degrees is the smallest angle.

Remark 7 Given a, sin−1 a is the angle θ such that sinθ = a.Thus,sin−1 a is an angle. When you use your calculator to perform this type of operations, you must be aware of whether your calculator is set in degrees or radians; the answer you get will be diﬀerent, though it will represent the same angle. For example,