samsharon2001 samsharon2001

04-08-2016
Mathematics

Answered

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

Acos 20
Bsin 160
Ctan(-20)
Dcos 70

Verified Answer :

04-08-2016

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)

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