CBSE Class 10 - Introduction to Trigonometric Identities Videos

• sinA(1+tanA)+CosA(1+cotA)=seA+cosecA
  
• Sin^2A/2+Sin^2(B+C/2)
• prove that 1+sina-cosa/1+sina+cosa=√1-cos/√1+cosa
• sin teta + 2cos teta =1 prove that 2sin teta - cos teta =2
• Cosec²72° - tan²18°=1
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• Show that … cosec theta minus 2sin cube theta upon 2cos cube theta minus cos theta is equals to tan theta
• please help
  
• please help me to solve this problem
  
• how to prive
  

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