prove that I have solution but I don't understand
Attachments:
Answers
Answered by
2
take theta=a
hope it will help you.
hope it will help you.
Attachments:
sayyedtouheed:
ek no bhai ek aur question please please
first, i am not bhai, i am sister.
and what you are telling i can't understand.
ok sister i put another question related this can solve it please...
yes.
Answered by
0
tan (45-A/2) = (tan 45 - tan A/2)/(1 + tan 45 tan A/2)
= (1- tan A/2)/(1+ tan A/2)
= (1- sin A/2/cos A/2)/(1+ sin A/2 / cos A/2)
= (cos A/2 - sin A/2)/(cos A/2 + sin A/2)
= ((cos A/2 - sin A/2)(cos A/2 + sin A/2))/(cos A/2 + sin A/2)^2
= (cos ^2 A/2 - sin ^2 A/2)/(cos^2 A/2 + sin ^2 A/2 + 2 sin A/2 cos A/2)
= (cos A)/(1+ sin A)
= (1- tan A/2)/(1+ tan A/2)
= (1- sin A/2/cos A/2)/(1+ sin A/2 / cos A/2)
= (cos A/2 - sin A/2)/(cos A/2 + sin A/2)
= ((cos A/2 - sin A/2)(cos A/2 + sin A/2))/(cos A/2 + sin A/2)^2
= (cos ^2 A/2 - sin ^2 A/2)/(cos^2 A/2 + sin ^2 A/2 + 2 sin A/2 cos A/2)
= (cos A)/(1+ sin A)
Similar questions