Prove the identity cosecA-cotA = tan(0.5A) Thanks in advance
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Originally Posted by Punch Prove the identity cosecA-cotA = tan(0.5A) Thanks in advance Try using half angle identities. and It should into an easy problem using these identities.
Originally Posted by 11rdc11 Try using half angle identities. and It should into an easy problem using these identities. I haven't learnt any half angles identities or formula yet
Have you learnt double angle identities yet?
yes
Originally Posted by Punch yes Ok let me show you how to derive them from the double angle now replace with which equals Same idea to derive for sin
=
I don't really understand it... Can you show me how to start and solve the question from cosecA-cotA = tan(0.5A) without using half angle? sorry
Do as you have been told. Use the double angle identities for sine and cosine to derive the half angle identities. Then do .
Thanks guys, finally understood half angle, thankd rdc
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