Упростите выражение: 1) (1-sin a)(1+sin a) / sin2 a2) sin a cos a / cos2 a3) tg a / sin a 22 балла . Created by stubbsofficial8. geometriya-ru

sin a 22 балла ...

stubbsofficial8 @stubbsofficial8

July 2022 1 8 Report

Упростите выражение:
1) (1-sin a)(1+sin a) / sin2 a
2) sin a cos a / cos2 a
3) tg a / sin a
22 балла

Answers & Comments

melya52

Объяснение:

$(1 - \sin( \alpha )) \times (1 + \sin( \alpha )) \div { \sin^2( \alpha )} = (1 - { \sin^2( \alpha ) } ) \div { \sin^2( \alpha ) } = { \cos^2( \alpha ) }\div { \sin^2( \alpha ) } = \cot^2( \alpha )$

$\sin( \alpha ) \cos( \alpha ) = \tan( \alpha )$

$\sin( \alpha ) \div ( \cos( \alpha ) \times \sin( \alpha )) = 1 \div \cos( \alpha )$

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v treugolnike abc ugol b 45 gradusov ugol a 30 gradusov najdite storonu ac75eb1c740587e1c705dd600ac940f6b2 38076

Answer

stubbsofficial8 July 2022 | 0 Ответы

v treugolnike abc ugol b 45 gradusov ugol a 30 gradusov najdite storonu acf12439b1c2e92ef3bdfd2619b19995d4 86154

Answer

Answers & Comments

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v treugolnike abc ugol b 45 gradusov ugol a 30 gradusov najdite storonu ac75eb1c740587e1c705dd600ac940f6b2 38076

v treugolnike abc ugol b 45 gradusov ugol a 30 gradusov najdite storonu acf12439b1c2e92ef3bdfd2619b19995d4 86154

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