1.

If cotA+tanB whole by cotB + tanA then prove that it is =cotA × tanB

Answer»

Step-by-step EXPLANATION:

(cosA/sinA+sinB/cosB)÷(cosB/sinB +sinA/cosA)

={(cosA.cosB+sinA.sinB)×sinB.cosA}÷{(cosA.cosB+sinA.sinB)×sinA.cosB}

=sinB/cosB×cosA/sinA

=cotA×tanB



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