2 Answers
ARKA(REEK)
·2010-07-27 05:39:29
HINT: The expr. can be rewritten as ....
1sinA - 1sinB = 1cosB - 1cosA
sinB - sinAsinAsinB = cosA - cosBcosAcosB
sinB - sinAcosA - cosB = tanAtanB
HINT: The expr. can be rewritten as ....
1sinA - 1sinB = 1cosB - 1cosA
sinB - sinAsinAsinB = cosA - cosBcosAcosB
sinB - sinAcosA - cosB = tanAtanB