29. If sec theta + tan theta = m and sec theta - tan theta = n, prove that mn = 1.
Answers
Answered by
3
Answer:
Step-by-step explanation:
mn= (sec theta + tan theta)(sec theta - tan theta)
= sec^2 theta - tan^2 theta
= 1
identity used - a^2-b^2 = (a+b)(a-b)
and sec^2 theta - tan^2 theta = 1
Answered by
2
Answer:
mn= (secX+tanX)(secX-tanX)
= sec²X-tan²X
=(1+tan²X)-tan²X
= 1 -tan²X+tan²X
=1
Proved
Step-by-step explanation:
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