Answered

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Are these correct? ILL MARK YOU BRAINLIEST

Are These Correct ILL MARK YOU BRAINLIEST class=

Sagot :

devishri1977

Answer:

Yes

Step-by-step explanation:

1) Cos 300 = Cos (360 - 60) = Cos 60    {Cos 360 - theta = Cos theta}

                                              = 1/2

Sin 300 = Sin (360 - 60) = -Sin 60 = [tex]\frac{-\sqrt{3}}{2}[/tex]

3) 3π/4 = 3*180/4 = 135

Cos 135 = Cos (90 + 45) = -Cos 45 = [tex]\frac{-\sqrt{2}}{2}[/tex]

Sin 135 = Sin (90 + 45) = Sin 45 = [tex]\frac{\sqrt{2}}{2}[/tex]

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