I- Sant
It Seca
it seca
-tand
+ ton A
cosA
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Answer:
Step-by-step explanation:
Sec²A - Tan²A+ SecA - TanA / 1 + SecA + TanA
= (SecA - TanA)(SecA + TanA) + (SecA - TanA) / 1 + SecA + TanA
= (SecA - TanA)(1 + SecA + TanA)/1 + SecA + TanA
= SecA - TanA
= 1 - SinA / CosA
= R.H.S
Hence proved.
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