trigonometry class 11 basics formula ll why sin(180+θ) =-sinθ, cos(180+θ) = -cosθ, tan(180+θ) = tanθ

in this video dheeraj sir maths wale discuss about trigonometry class 11 basics formula ll why sin(180-θ) = sinθ, cos(180-θ) = -cosθ, tan(180-θ) = tanθll cbse board CBSE board mp board& cg board by maths wale

sin(180+θ) = sinθ, cos(180+θ) = cosθ, tan(180+θ)) = tanθ
Sign of trigonometry ratio त्रिकोणमितीय अनुपातो के चिन्ह ASTC rule all sin tan cos

Trigonomerty class 11 redain to degree conversion and degree to radian conversion
Navbodh maths trigonometric function exercise 1(c).1 from Q.2 to Q.4

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why sin(-θ) = -sin(θ)
cos(-θ) = cos(θ)
tan(-θ) = -tan(θ)

cot(-θ) = -cot(θ)

sin(90-θ) = cosθ, cos(90-θ) = sinθ, tan(90-θ) = cotθ
sin(180+θ) =-sinθ, cos(180+θ) = -cosθ, tan(180+θ) = tanθ

[umeshverma]

Sir ase poore proof Kara dijiye koi teacher nahi karata hai pure you tube par

[shivam-kharkhate]

Sir can you prove this formula by taking (θ) obtuse

[shivam-kharkhate]

Sin (180+(θ)) = sin (θ) me sir (θ) kya obtuse angle ho sakta hai 😢😢😢😢😢😢😢😢

[aktechnology]

What is the relation between 180+theta in lower triangle
Please reply me very soon