Question

find this question pls
for mathematics genius​

Answer 1

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➠ $\bold { Value \; of \; cos^{-1}(-cos\frac{2\pi }{3} ) }$

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❏ Cosine (cos) is a one of the important trigonometric function in mathematics. It has a great importance in geometry and physics too !

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❏ Refer attachment for some values assigned to certain angles for important trigonometric functions

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Let's Start !

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Let's solve this question by solving from inside !

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$\boxed { \bold { \red { :\implies cos^{-1}(-cos\dfrac{2\pi }{3} ) } } }$

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$\bold { \blue { :\implies cos^{-1}(-\{\dfrac{-1}{2}\} ) } }$

$\bold { \orange { :\implies cos^{-1}(\dfrac{1}{2} ) } }$

$\boxed{ \bold { :\implies \dfrac{\pi }{3} } }$

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⭐ Taking inverse of cosine function simply means that for the given value of angle the given value is there !

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Here,

$\boxed { \bold { \pink { \bigstar \; cos(\dfrac{\pi }{3} ) = \dfrac{1 }{2} } } }$

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$\boxed{\boxed{\bold{\therefore \bold { Value \; of \; cos^{-1}(-cos\dfrac{2\pi }{3} ) }=\dfrac{\pi }{3} }}}$

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Hope this helps u.../

【Brainly Advisor】

Answer 2

Answer:

VALUE OF COS -1 (-cos 2π/3 ) = π / 3

Step-by-step explanation:

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