sec theta + tan theta is equal to K then find cos theta
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1/cosθ + sinθ/cosθ =k
1+sinθ/cosθ =k
1+sinθ=kcosθ
cosθ=1+sinθ/k
1/cosθ + sinθ/cosθ =k
1+sinθ/cosθ =k
1+sinθ=kcosθ
cosθ=1+sinθ/k
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