What is the scale factor of two regular pentagons that have areas of 50cm square and 162cm square.

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?

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

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