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If A + B =900, then find the value of sin2 A + sin2 B.

bandari vishnu , 9 Years ago
Grade 10
anser 1 Answers
Navdeep Singh

Last Activity: 9 Years ago

sin2A+sin2B=sin2A+1-cos2B
                  =1-(cos2B-sin2A)
                  =1-(cos(A+B)cos(A-B))
                   =1-(cos(900)cos(A-B))                            ;(A+B=900)
                    =1-(0)                                                          ;cos(900)=0
                    =1

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