Question
sin1440° - cot630° - sin120°cos150° is equal
to:Solution
sin1440° - cot630° - sin120° cos150°
= sin(4 X 360° + 0°) - cot(2 X 360° - 90°) - sin(180° - 60°)cos(90° + 60°)
= sin0 o + cot90 o + sin60 o sin60 o
= 0 + 0 + (√3/2) 2 = (3/4)
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