cosA - sin A / cos A + sin A = sec2A - Tan2A
Answers
Answered by
0
Answer:
Step-by-step explanation:
cosA - sin A / cos A + sin A = sec2A - Tan2A
LHS = (cosA - sin A)( cos A - sin A) / ( cos A + sin A)( cos A - sin A)
(cos²A+sin²A-2sinAcosA) / ((cos²A - sin² A)
=(1-sin2A)/cos2A
=1/cos2A-sin2A/cos2A
=sec2A - tan2A=RHS
Similar questions