solve sin (-1125°),cosec (390°),cot (570°),tan (480°),cos (270°), plzzzzzzzzz
Answers
---Yeah sure for your help
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Here is your answer which you are searching for
=> We know that the value of
----> sin ( - 1125 °) = -1 / root 2
-----> Cosec ( 390 °) = 2/1
-----> Cot ( 570 °) = root 3
------> Tan ( 480 °) = -root 3
------> Cos ( 270 °) = 0
So the question is how we can say that let us prove each of the following one by one
Sin (- 1125 °)
=> - sin 1125
=> -sin ( 3 multiply 360 + 45 )
=> - sin 45
=> -1/root 2
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Cosec ( 390 °)
=> 390 ° = 360°+ 30 °+ 30 °
=> Cosec ( 390 °) 1/ sin 30 °
=2/1
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Cot ( 570 °)
=> 570 ° = 360 °+ 180 °+ 30 °
=> Ref angle is 30 ° and the angle on third quadrant is cot
=> cot ( 570° ) = cot 30°
=> root 3
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Tan ( 480 °)
=> tan ( 360 + 120 )
=> tan 120 = ( 180 - 60 )
=> - tan 60 = - root 3
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Cos ( 270 °)
=> 0°
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