(1 + cot θ - cosec θ)(1 + tan θ + sec θ) எதற்குச் சமம்?

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Answer (Detailed Solution Below)

Option 2 : 2
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கருத்து:

முக்கோணவியல் சூத்திரம்

cot θ = \(\rm \frac{cos θ }{sin θ }\)

tan θ = \(\rm \frac{sin θ }{cos θ }\)

cosec θ = \(\rm \frac{1 }{sin θ }\)

sec θ = \(\rm \frac{1}{cos θ }\)

sin2 θ + cos2 θ = 1

(sin θ + cos θ)2 = sin2 θ + cos2 θ + 2 sin θ cos θ 

 

கணக்கீடு:

 (1 + cot θ - cosec θ)(1 + tan θ + sec θ) இன்மதிப்பைக் கண்டறியவும்

= (1 + \(\rm \frac{cos θ }{sin θ }\) - \(\rm \frac{1 }{sin θ }\)) (1 + \(\rm \frac{sin θ }{cos θ }\) + \(\rm \frac{1}{cos θ }\))

\(\rm \frac{(sin θ + cos θ - 1) ( sin θ + cos θ + 1)}{sin θ \: cosθ }\)

\(\rm \frac{( sin θ + cos θ )^{2} - 1}{ sin θ cos θ }\)

\(\rm \frac{sin^{2}θ + cos^{2}θ + 2 sin θ cos θ - 1}{sinθ \: cos θ }\)

\(\rm \frac{1 + 2 sin θ cos θ - 1}{sinθ \: cos θ }\)

\(\rm \frac{2 sin θ cos θ }{sinθ \: cos θ }\)

= 2

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