Prove that −cos+1 +−1= 1 −tan
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Answer:
question is unclear.
Step-by-step explanation:
We want to prove that:
cosA1−tanA+sinA1−cotA≡cosA+sinA
If we manipulate the LHS we have:
LHS=cosA1−tanA+sinA1−cotA
=cosA1−sinAcosA+sinA1−cosAsinA
=cosAcosA−sinAcosA+sinAsinA−cosAsinA
=cos2AcosA−sinA+sin2AsinA−
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