1.

Prove that sec theta - sin theta tan theta = cos theta​

Answer»

Step-by-step EXPLANATION:

=sec◆ - sin◆ tan◆

=[sec◆ = 1/cos◆]. [tan◆ = sin◆/cos◆]

=1/cos◆ - sin^2◆/cos◆

=[cos^2◆ = 1 - sin^2 ◆]

=(1 - sin^2 ◆)/cos◆

=cos^2◆/ cos◆

=cos◆ =R.H.S.

PROVED



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