If f(x)=cosx, then f(x+ pi/2) is equal to a -cosx b 1+cosx c sinx d -sinx e none of the above provide reasoning.

Will give are given that xy is parallel to zw. if xz is a transversal that intercepts xy and zw, angle angle alternate interior angles. since xy is parallel to zw, we know that these angles are we also know that angle xvy and angle zvw are , and thus congruent. we can conclude that △xyv ~ △zwv using the similarity theorem.

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is

Find the area of a parallelogram with base 15 yards and height 21 2/3