REVENUE OFFICER Government Jobs Exams

sin35 sin55 - cos 35 cos 55 ?

Read Solution (Total 2)

Ans:
0
soln:
sinA sinB - cosA cosB = cos(A+B)
==> cos(35+55)
=cos 90
=0.
11 years agoHelpfull: Yes(0) No(0)

cos(A+B)=sinA sinB - cosA cosB
hence cos(35+55)=sin35sin55-cos35cos55
cos90=0=sin35sin55-cos35cos55

ans is 0
11 years agoHelpfull: Yes(0) No(0)

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