If `sin2A=2sinA` then `A=`

sin2A=2sinA is true when A= (a) 0^@ (b) 30^@ (c) 45^@ (d) 60^@

If sin2A=2sinA cosAand sin20^(@)=K, " then the value of " cos20^(@)cos80^(@)cos160^(@) =__________.

Choose the correct option and justify your choice. sin2A = 2sinA is true when A =

If siny=xsin(a+y) , then (dy)/(dx) is (a) (sina)/(sina sin^2(a+y)) (b) (sin^2(a+y))/(sina) (c) sina sin^2(a+y) (d) (sin^2(a-y))/(sina)

Statement I: If sinA=sinB , cosA=cosB then A= 2np + B Statement II :If A+B+C=90^@ then sin2A+sin2B + sin2C = 4 sinA sinB sinC Which of the above statements is correct?

If sqrt(1+sinA)-sqrt(1-sinA)=2"sin"A/2"then"A/2 in

If sinA=1/2 find sin2A & cos2A