1. The problem is to find the value of a trigonometric expression or solve a problem involving angles without using the sine function, suitable for a grade 9 level. 2. Since sine is not allowed, we can use the Pythagorean theorem or basic right triangle properties to find missing sides or angles. 3. For example, if we have a right triangle with one angle and one side, we can use the Pythagorean theorem: $$a^2 + b^2 = c^2$$ where $c$ is the hypotenuse. 4. If the problem involves finding an angle, we can use the tangent ratio: $$\tan(\theta) = \frac{\text{opposite}}{\text{adjacent}}$$ which can be solved by finding the ratio of the two sides. 5. Alternatively, if the problem is to find a side length, use the known sides and the Pythagorean theorem. 6. Without the exact problem, the general approach is to rely on right triangle side ratios and the Pythagorean theorem instead of sine. 7. If you provide the specific problem, I can show the detailed steps without using sine.