Calculate cos22.5 + sin 15 + sin 345 + cos 202.5
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Answer: 0
Step-by-step explanation:
cos(22.5)+sin(15)+sin(360-15)+cos(180-22.5) (sin(360-15) = sin(-15) = -sin(15)
cos(180-22.5) = cos(180-x)
-cos(x))
therefore everything gets cancelled hence zero
hope u understand
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