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Evaluate cos570° sin510°-sin330°cos390° |
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Answer» Answer: Answer is 0. Step-by-step EXPLANATION: Given, cos570° sin510° - sin330° cos390° = cos(360+210)sin(360+150)-sin(360-30) cos(360+30) = cos210 sin150 - (-sin30) cos30 = cos(270-60) sin(180-30) + sin30 cos30 = (-sin60)(sin30) + sin30 cos30 = (-√3/2)(½) + (½)(√3/2) = (-√¾) + (√¾) = (-√3)+ √3/4 = 0/4 = 0 cos570° SIN510° - sin330° cos390° = 0. I hope helps u.., Please mark my answer in brainliest.., |
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