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Q 35 Calculate the value of [Sin 135° + Cos 225°).Ops: A0-1/ 2B.OOC.O-22D.O 422 |
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Answer» Answer: Step-by-step EXPLANATION: sin135°=sin(2×90°-45°)=sin45°=1/√2 cos225°=cos(2×90°+45°)= -cos45°= -1/√2 therefore, (sin145°+cos225°) =(1/√2) +(-1/√2) =0 |
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