Question

Calculate cos22.5 + sin 15 + sin 345 + cos 202.5

Answer 1

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