[" 9.If "sin theta+cos theta=sqrt(2)cos theta" then "cos theta-sin^(2)theta" .The maxim "],[[" (a) "sqrt(2)cos theta," (b) "sqrt(2)sin theta_(h)(a),5],[" (c) "sqrt(2)(cos theta+sin theta)," (b) "sqrt(2)sin theta_(h)],[" 10.In a right angled triangle,the hypotent "]]