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Rahim and Nadeem are two friends whose plots are adjacent to each other. Rahim's son made a drawing of the plots with necessary details. It is decided that Rahim will fence the triangular plot ABC and Nadeem will fence along the sides AF, FE and BE. Observe the diagram carefully and answer the following questions : (Use √2 = 1.41 and √3 = 1.73)
Verify that sin (A + B) = sin A cos B + cos A sin B for A = 60° and B = 30°.
Evaluate : cos 45° / (tan 30° + sin 60°)
Verify that sin 2A = 2 tan A / (1 + tan² A), for A = 30°.
Verify that sin 2A = 2 tan A/(1 + tan² A), for A = 30°.
Evaluate (5cos²60° + 4sec²30° – tan²45°)/(sin²30° + cos²30°)
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