Mathematics, 04.06.2021 05:30 quarrella
prove that costheta/sintheta+cosbeta +cosbeta/sinbeta-costheta=costheta/ sintheta -cosbeta +cosbeta/sinbeta +costheta
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prove that costheta/sintheta+cosbeta +cosbeta/sinbeta-costheta=costheta/ sintheta -cosbeta +cosbeta/...
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