a. cos(150) cos (75*) -sin (150) sin (75) =0 TRUE FALSE b. sin ( -! )=167 TRUE FALSE c. tan' (0) +1=sec' (@) TRUE
a. cos(150) cos (75*) -sin (150) sin (75) =0 TRUE FALSE b. sin " ( -! )=167 TRUE FALSE c. tan' (0) +1=sec' (@) TRUE FALSE d. sin (cos ' (-1)) =0 TRUE FALSE
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