cot x/2-tanx/2=2 cot x
Answers
Answered by
5
Cotx/2 - tanx/2
Take x/2 = a for easy notation
= cosa / sina - sina/cosa
= cos²a - sin²a / sin a cosa
Multiply by 2 .
= 2 ( cos2a) / 2sina cosa
= 2cos2a / sin2a
= 2 cot 2a
= 2 cot 2 ( x/2)
= 2 cot x.
Answered by
17
Step-by-step explanation:
gh151271p397ss is waiting for your help.
Add your answer and earn points.
HappiestWriter012
HappiestWriter012Maths AryaBhatta
cotx/2 - tanx/2
Take x/2 = a for easy notation
= cosa / sina - sina/cosa
= cos²a - sin²a / sin a cosa
Multiply by 2 .
= 2 ( cos2a) / 2sina cosa
= 2cos2a / sin2a
= 2 cot 2a
= 2 cot 2 ( x/2)
= 2 cot x.
Similar questions