Math, asked by soniyesh1028, 10 months ago

(1 + tan A + sec A) ( 1 + cot A - cosec A)
a) 0
b) 1
c) 2
d) -1

Answers

Answered by swapnadutta411

4

Answer:

=(1+sinA/cosA+1/cosA)(1+cosA/sinA-1/sinA)

=(cosA +sinA+1/cosA)(sinA+cosA-1/sinA)

=(cosA+sinA)2-(1)2/cosAsinA

=cos2A + 2cosAsinA +sin2A -1/cosAsinA

=1+2cosAsinA-1/cosAsinA

=2cosAsinA/cosAsinA

=2

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