Vaof day Further Trigonometry. Sin(180 - A)=Sin A , Cos(180 - A)= - Cos A , and Tan(180 - A) = - Tan A

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Monday, 11/05/2026

Further Trigonometry. Sin(180 - A)=Sin A , Cos(180 - A)= - Cos A , and Tan(180 - A) = - Tan A

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Video: Further Trigonometry. Sin(180 - A)=Sin A , Cos(180 - A)= - Cos A , and Tan(180 - A) = - Tan A

Why is cos(180 - theta) = -cos(theta) and sin(180 - theta) = sin(theta)?

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tan 180 tg 180

tan(180 + x) | tan(pi + x) | tan(180 + A) | tan(pi + A) | tan(180 + theta) | tan(pi + theta)

How and why T Rstios, Tan(90-A) Tan(90+A) Tan180-A tan 180+A tan 270-A tan 270+A tan 360-A cot 270-A

## sin(180+x)= - Sinx but tan(180+x) = tanx ..... how/why.......##

tan(180 – x) | tan(pi – x) | tan(180 – A) | tan(pi – A) | tan(180 – theta) | tan(pi – theta)

Further Trigonometry. Sin(180 - A)=Sin A , Cos(180 - A)= - Cos A , and Tan(180 - A) = - Tan A

`cot A + tan (180^@-A) + tan (90^@ + A) + tan (360^@ + A) =0`

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