prove that 1/cos²theta + (2sin theta) /cos theta = (1+tan theta)²
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Step-by-step explanation:
=1/cossqare2 theta +2sintheta
=1/costheta+2sintheta.costheta/cos sqare2 theta
=1+2sintheta.cos theta /cossquare theta weknown sinsqaure theta +cos sqaure =1
so (a+b)=a2+b2 +2ab
=(sintheta +cos theta /costheta)2
=(1+tantheta)2
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