Solve this fast....
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Simple Solution :
Given Cot Ф = (7/8).
LHS = (1 + sinФ)(1 - sin Ф)/(1 + cos Ф)(1 - cos Ф)
We know that (a + b)(a - b) = a^2 - b^2
⇒ (1 - sin^2 Ф)/(1 - cos^2 Ф)
⇒ cos^2 Ф/sin^2 Ф
⇒ cot^2 Ф
⇒ (7/8)^2
⇒ 49/64.
Hope this helps!
twinkle1709:
Thnks a million
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