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July 2022
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tg^2B(1-sinB)(1+sinB)
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Юленька194
Verified answer
tg
²
(b) *(1-sinB)(1+sinB)
=tg²(b) (1-sin²b)= tg² (b) -tg² (b)*sin²(b) =tg²b-sin^4b/cos²b = sin²b(cos²b/cos²b)=sin²b
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Verified answer
tg²(b) *(1-sinB)(1+sinB)=tg²(b) (1-sin²b)= tg² (b) -tg² (b)*sin²(b) =tg²b-sin^4b/cos²b = sin²b(cos²b/cos²b)=sin²b