Cambridge Additional Mathematics

254 Trigonometric functions (Chapter 9)

11 Expand and simplify if possible:

a (2 sin®¡1)^2 b (cos®¡sin®)^2

12 Show that:

a

cosμ

1 + sinμ

+

1 + sinμ

cosμ

= 2 secμ b (1 + secμ)

¡

cosμ¡cos^2 μ

¢

= sin^2 μ

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Additional Mathematics
Y:\HAESE\CAM4037\CamAdd_09\254CamAdd_09.cdr Monday, 6 January 2014 5:01:08 PM BRIAN