Question

Explain and Answer The Value Of
Cos162°=

Answer 1

solution:

= cos ( 180° - 18°)

= - cos 18° [ cos (180° - theta)= -cos theta]

So,answer is -cos 18°

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Answer 2

Hola!

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Here is your answer

Cos(162)
=> Sin( 90- theta)
Sin(theta)

Sin(90-162)
Sin(-72)
And now by using calculator
Sin(-72) => -0.9510


Or

Wkt
Cos(180-theta)
-cos(theta)
Cos(180-18)
-cos(18)

Hence
-cos(18) => -0.9510

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Hope it's help you