Math, asked by shettysaraswathi9922, 5 months ago

prove sec A-1/tan A = secA + tanA-1/ secA + tan A+1​

Answers

Answered by Anonymous
37

Answer:

secA + tanA - 1 / tanA - sec + 1 = cosA / 1 - sinA

LHS = secA + tanA - 1 / tanA - secA + 1

=secA + tanA - (sec²A - tan²A) / tanA - secA + 1 (1 + tan²A = sec²A)

=(secA + tanA) - (secA + tanA)(secA - tanA) / tanA - secA + 1

=(secA + tanA){1 - (secA - tanA)} / tanA - secA + 1

=(secA + tanA)(1 - secA + tanA) / tanA - secA + 1

=secA + tanA

=1 / cosA + sinA / cosA

=1+sinA/cosA

RHS=cosA/1 - sinA

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

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

=cosA(1 + sinA) / 1 - sin²A (sin²A + cos2A = 1)

=cosA(1 + sinA) / cos²A

RHS =1 + sinA / cosA = LHS

Hence proved

Answered by shresthsourya8D
3

Answer:

RHS is 1+sinA/cosA=LHS hence verified

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