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Question
θ = 30° घेऊन खालील त्रिकोणमितीय नित्यसमानतेचा पडताळा घ्या:
sin2θ + cos2θ = 1
Theorem
Solution
पक्ष: θ = 30°
साध्य: sin2θ + cos2θ = 1
सिद्धता:
डावी बाजू = sin2θ + cos2θ
= sin230° + cos230°
= `(1/2)^2 + (sqrt 3/2)^2`
= `1/4 + 3/4`
= `4/4`
= 1
डावी बाजू = उजवी बाजू
∴ sin2θ + cos2θ = 1
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