1. verify sin^4 x-sin^2 x= cos^4 x-cos^2 x is an identity.
2.verify sin(360o-theta)=-sin theta...
Mathematics, 28.07.2019 06:10 lekepius3715
1. verify sin^4 x-sin^2 x= cos^4 x-cos^2 x is an identity.
2.verify sin(360o-theta)=-sin theta
Answers: 3
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