5.3--Sum and Difference Identities
Find the exact value without using a calculator:
1)
sin (7π/12)
2)
tan 195o
5.3--Sum and Difference Identities
Write each expression as the sine, cosine, or tangent of an angle:
3)
(sin 32o)(cos 25o) + (cos 32o)(sin 25o)
4)
(cos 73o)(cos 7o) + (sin 73o)(sin 7o)
5)
tan 52o - tan 40o
1 - (tan 52o)(tan 40o)
6)
(cos 46o)(cos 26o) - (sin 46o)(sin 26o)
5.3--Sum and Difference Identities
Prove the following cofunction identity: (without using cofunctions!!
7)
tan (π/2 - x) = cot x
)