Evaluate : (sin30 +sin45) ( cos60 -cos45) help me plz its argent.
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Answer:
-1/4
Step-by-step explanation:
sin30 = 1/2
sin45 = 1/root 2
cos60 = 1/2
cos 45 = 1/root2
=>(1/2 + 1/root2)(1/2 - 1/root2)
=>(1/2)sq - (1/root2)sq
=>1/4 - 1/2 => -2/8 = -1/4
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