New Topic: Compound Angle Formulae, MiA Unit 2 Ch3

By the end of this topic you will be able to:

• know and apply the addition formulae:

sin(A+B) = sinAcosB + cosAsinB

sin(A–B) = sinAcosB – cosAsinB

cos(A+B) = cosAcosB – sinAsinB

cos(A–B) = cosAcosB + sinAsinB

• know and apply the double angle formulae:

sin2A = 2sinAcosA

cos2A = cos2A – sin2A = 2cos2A – 1

• apply trigonometric formulae in solution of geometric problems

• solve trigonometric equations using compound angle formulae

Mr H, on Thursday 4 December, 2008 at 0:38 said:Thursday 4 December, Periods 2 & 3Revision of trig exact values.

Proof of sin(A+B) then p155 Ex2

Quadratic Theory homework due.

Mr H, on Thursday 4 December, 2008 at 21:36 said:All above completed.

Mr H, on Thursday 4 December, 2008 at 21:37 said:Friday 5 December, Period 2Exact values starter then complete Ex3 from Q3 on.

Mr H, on Sunday 7 December, 2008 at 23:23 said:Most of class reached proof questions at end of Ex.

Will come back to better problems when all formulae covered.

Mr H, on Sunday 7 December, 2008 at 23:25 said:Monday 8 December, Period 6Double Angle Formulae, Ex4A.

Derive formulae then complete Q1,2,4,8,9,11-13.

Mr H, on Monday 8 December, 2008 at 16:42 said:CAST rule starter to begin then rattled through examples above except Q11, 12b & 13 – will complete next lesson.

Look at further trig identities.

Mr H, on Tuesday 9 December, 2008 at 23:34 said:Wednesday 10 December, Period 6Revise trig equations: CAST rule, radians, etc.

Examples then Ex4 from p53.

Mr H, on Thursday 11 December, 2008 at 0:37 said:Thursday 11 December, Periods 2 & 3Solving trig equations.

p54 Ex5 Q2,3,4

p55 Ex6 Q1-6

p161 Ex5 All Q’s

Homework:IntegrationDue:Thursday 18 DecemberMr H, on Thursday 11 December, 2008 at 16:57 said:Spent some time on an Exact Values starter exercise.

All pupils working on first half of p161 Ex5.

Homework issued.

Mr H, on Thursday 11 December, 2008 at 16:58 said:Friday 12 December, Period 2Complete p161 Ex5 then some from p55 Ex6.