Question

cos 135º – cos 120°
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cos 135° + cos 1200 =(3 - 2/2)
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Answer 1

Answer:

here is your answer dear....

put the value of cos135°=-1/root2

And cos120°=-1/2

And change the cos1200 in simplest form

To change it : 1200/360= find the remainder and take it for angle

So we find 180

And cos180=-1

Finally we put the value and find the answer...

THANKS dear if it's help you thanks please give the brilliant answer......