1.

Prove : 1 / (sec Q - tan Q) = sec Q + tan Q

Answer»

ANSWER:

Step-by-step EXPLANATION:

SECQ + TANQ)(1-sinQ) = COSQ

LHS = (1/cosQ +sinQ/cosQ)(1-sinQ)

=( 1+sinQ/cosQ)(1-sinQ)

= 1-sin^2Q/cosQ

=cos^2Q/cosQ

= cosQ



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