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Q4) Find the angle the beam makes with the pool surface. Round your answer to the nearest degree. A spotlight on a 3.0 m stand shines on the surface of a swimming pool. The beam of light hits the water at a point 7.0 m away from the base of the stand. 3.0 m 7.0 m Q5) Use the cosine law to calculate each unknown side length to the nearest unit and each unknown angle to the nearest degree. 5 cm B 6 cm Q6) The sides of an isosceles triangle are 12 cm, 12 cm, and 16 cm. Use primary trigonometric ratios to determine the largest interior angle to the nearest degree. (Hint: Divide the triangle into two congruent right triangles.)