(b) Factorise 3n + 12
2 answers:
You might be interested in
Answer:
Step-by-step explanation:
RHS = (1 +Sec Ф)(1 - Cos Ф)
= 1*1 - 1*Cos Ф + Sec Ф *1 - Sec Ф *Cos Ф
= 1 - Cos Ф + Sec Ф - 1 {Sec Ф = )
=Sec Ф - Cos Ф
= - Cos Ф
= Sin Ф* tan Ф = LHS