hi guys! i need explanation how do we solve questions like sin 135, cos 60, tan -180, cos -270 without using calculator. Pls explain it to me clearly. thank u
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Originally Posted by thereddemon hi guys! i need explanation how do we solve questions like sin 135, cos 60, tan -180, cos -270 without using calculator. Pls explain it to me clearly. thank u First of all you should remember the basic sine and cosine values: , , , Hope this helps
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