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- 1. Multiple Choicesin(A+B)sin A cos B + cos A sin Bsin A cos B - cos A sin Bcos A cos B - sin A sin Bcos A cos B + sin A sin B
- 2. Multiple Choicesin(A-B)sin A cos B + cos A sin Bsin A cos B - cos A sin Bcos A cos B - sin A sin Bcos A cos B + sin A sin B
- 3. Multiple Choicecos(A+B)sin A cos B + cos A sin Bsin A cos B - cos A sin Bcos A cos B - sin A sin Bcos A cos B + sin A sin B
- 4. Multiple Choicecos(A-B)sin A cos B + cos A sin Bsin A cos B - cos A sin Bcos A cos B - sin A sin Bcos A cos B + sin A sin B
- 5. Multiple Choicetg (a + b)(tga + tgb) : (1 - tga tgb)(tga - tgb) : (1 + tga tgb)(1 + tga tgb) : (tga - tgb)(1 - tga tgb) : (tga + tgb)
- 6. Multiple Choicetg (a - b)(tga + tgb) : (1 - tga tgb)(tga - tgb) : (1 + tga tgb)(1 + tga tgb) : (tga - tgb)(1 - tga tgb) : (tga + tgb)
- 7. Multiple Choicectg (a + b)(ctga ctgb + 1) : (ctgb - ctga)(ctga ctgb - 1) : (ctgb + ctga)(ctgb + ctga) : (ctga ctgb - 1)(ctgb - ctga) : (ctga ctgb + 1)
- 8. Multiple Choicectg (a - b)(ctga ctgb + 1) : (ctgb - ctga)(ctga ctgb - 1) : (ctgb + ctga)(ctgb + ctga) : (ctga ctgb - 1)(ctgb - ctga) : (ctga ctgb + 1)
- 9. Multiple ChoicesinA+sinB2 cos[(A-B)/2] sin[(A+B)/2]2 cos[(A+B)/2] sin[(A-B)/2]2 cos[(A+B)/2] cos[(A-B)/2]-2 sin[(A+B)/2] sin[(A-B)/2]
- 10. Multiple ChoicesinA-sinB2 cos[(A-B)/2] sin[(A+B)/2]2 cos[(A+B)/2] sin[(A-B)/2]2 cos[(A+B)/2] cos[(A-B)/2]-2 sin[(A+B)/2] sin[(A-B)/2]
- 11. Multiple ChoicecosA+cosB2 cos[(A-B)/2] sin[(A+B)/2]2 cos[(A+B)/2] sin[(A-B)/2]2 cos[(A+B)/2] cos[(A-B)/2]-2 sin[(A+B)/2] sin[(A-B)/2]
- 12. Multiple ChoicecosA-cosB2 cos[(A-B)/2] sin[(A+B)/2]2 cos[(A+B)/2] sin[(A-B)/2]2 cos[(A+B)/2] cos[(A-B)/2]-2 sin[(A+B)/2] sin[(A-B)/2]
- 13. Multiple ChoicetgA+tgBsin(a+B)/cosa*cosBsin(a-b)/cosa*cosBsin(a+b)/sinasinbsin(b-a)/sinasinb
- 14. Multiple ChoicetgA-tgBsin(a+B)/cosa*cosBsin(a-b)/cosa*cosBsin(a+b)/sinasinbsin(b-a)/sinasinb
- 15. Multiple ChoicectgA+ctgBsin(a+B)/cosa*cosBsin(a-b)/cosa*cosBsin(a+b)/sinasinbsin(b-a)/sinasinb
- 16. Multiple ChoicectgA-ctgBsin(a+B)/cosa*cosBsin(a-b)/cosa*cosBsin(a+b)/sinasinbsin(b-a)/sinasinb
- 17. Multiple Choicesina⋅cosb1/2(sin(a+b)+sin(a-b))-1/2(sin(a+b)-sin(a-b))1/2(cos(a+b)+cos(a-b))-1/2(cos(a+b)-cos(a-b))
- 18. Multiple Choicecosa⋅cosb1/2(sin(a+b)+sin(a-b))-1/2(sin(a+b)-sin(a-b))1/2(cos(a+b)+cos(a-b))-1/2(cos(a+b)-cos(a-b))
- Answer choicesTagsAnswer choicesTags