Given that cos 160 = - q, express each of the following in terms of q:

a) cos 20

b) sin 160

c) tan (-20)

d) cos 70

Question

Livia Stout

26 January, 01:48

+3

Answers (2)

Know the Answer?

Amaya Parker · Answer 1

Hello,

cos 160°=-q

cos 20°=-cos 160°=q

sin 20°=√ (1-q²) = sin 160°

tan - 20°=tan 160=√ (1-q²) / - q

cos 70°=sin 20°=√ (1-q²)

Micaela Mason · Answer 2

Cos 160°=-q

cos 20°=-cos 160°=q

sin 20°=√ (1-q²) = sin 160°

tan - 20°=tan 160=√ (1-q²) / - q

cos 70°=sin 20°=√ (1-q²)

Given that cos 160 = - q, express each of the following in terms of q:a) cos 20b) sin 160c) tan (-20)d) cos 70