why we use cos theta in dot product and sin theta in cross product????|Easy explanation with notes

why we use cos theta in dot product and sin theta in cross product????|Easy explanation with notes
#DotProductExplanation
#CrossProductExplanation
#DotProductVsCrossProduct
#DotProductWithExamples
#CrossProductWithExamples
#WhyCosThetaInDotProduct
#WhySinThetaInCrossProduct
#DotProductFormula
#CrossProductFormula
#DotProductApplications
#CrossProductApplications
#DotProductInPhysics
#CrossProductInPhysics
#CosThetaInDotProductMeaning
#SinThetaInCrossProductMeaning
#GeometricInterpretationOfDotProduct
#GeometricInterpretationOfCrossProduct
#DotProductVectorProjection
#CrossProductVectorPerpendicular
#DotProductAndAngleBetweenVectors
#CrossProductAndAngleBetweenVectors
#DotProductCosThetaExplanation
#CrossProductSinThetaExplanation
#WhyUseCosThetaDotProduct
#WhyUseSinThetaCrossProduct
#DotProductPhysicsProblems
#CrossProductPhysicsProblems
#DotProductRealLifeApplications
#CrossProductRealLifeApplications
#UnderstandingDotProduct
#UnderstandingCrossProduct
#DotProductCosThetaExample
#CrossProductSinThetaExample
#DotProductAndWorkDone
#CrossProductAndTorque
#DotProductAndMagnitude
#CrossProductAndMagnitude
#DotProductProof
#CrossProductProof
#DotProductAndProjection
#CrossProductAndArea
#DotProductAndDirection
#CrossProductAndDirection
#DotProductInVectors
#CrossProductInVectors
#DotProductDetailedExplanation
#CrossProductDetailedExplanation
#CosThetaMeaningInDotProduct
#SinThetaMeaningInCrossProduct