Oliver is building a box kite. the frame of the kite has the dimensions shown. he covered the sides of the kite (but not the top and bottom) with 720072007200 cm^2 2 start superscript, 2, end superscript of lightweight fabric.

What is sin 7x/4 ? i need on this urgent trig

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b

The ratio of the perimeters of two similar triangles is 4: 3. what are the areas of these triangles if the sum of their areas is 130cm2?