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- 1. Multiple ChoiceSimplify:
1-2sin215osin(30o)sin(15o)cos(30o)cos(15o) - 2. Multiple ChoiceSimplify:
sin10ocos15o-sin15ocos10ocos(-5o)sin(5o)cos (5o)sin(-5o) - 3. Multiple ChoiceWhat is the sum of sines formula?sin(a+b)=sina+sinbsin(a+b)=sinasinb+cosacosbsin(a+b)=sinacosb+sinbcosasin(a+b)=sinacosb-sinbcosa
- 4. Multiple ChoiceWhich is not a version of the double angle formula for cosines?cos2(x)-sin2(x)2cos2x-1cos2x+sin2x1-2sin2(x)
- 5. Multiple ChoiceWhich is the correct form of the addition formula for cosine?sin2x+cos2=1a2=b2+c2-2bccosAcos(a+b)=cosacosb-sinasinbsinA/a=sinB/b=sinC/c
- 6. Multiple ChoiceWhich of the following is the law of sines?sinA/a=sinB/b=sinC=cb2=a2+c2-2accosBsin(a+b)=sinacosb+sinbcosacos(a-b)=cosacosb+sinasinb
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