The trignometrical value of sin^260° is
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sin260° is the same as (sin60°)2 (square of sin60°).
There are some common angles like 0°, 30°, 45°, 60° and 90°. We know sine values of these angles (0,1/2,√2/2,√3/2,10,1/2,√2/2,√3/2,1 in same order).
sin60°equals √3/2
If we take square of this number, we get 3/4 (Square of square root of 3 is just 3 and square of 2 is 4)
So the answer is 3/4or we can write as 0.75
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