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mario62 [17]
3 years ago
13

1 + 10 square theta (1 - sin square theta is equals to 1​

Mathematics
1 answer:
KengaRu [80]3 years ago
3 0

Let's prove

\boxed{\sf 1+tan^2\theta(1-sin^2\theta)=1}

LHS

\\ \sf\longmapsto 1+tan^2\theta(1-sin^2\theta)

\\ \sf\longmapsto 1+\dfrac{sin^2\theta}{cos^2\theta}(1-sin^2\theta)

\\ \sf\longmapsto \dfrac{cos^2\theta+sin^2\theta}{cos^2\theta}(1-sin^2\theta)

\\ \sf\longmapsto \dfrac{1}{cos^2\theta}(1-sin^2\theta)

\\ \sf\longmapsto \dfrac{1-sin^2\theta}{cos^2\theta}

\\ \sf\longmapsto \dfrac{1-sin^2\theta}{1-sin^2\theta}

\\ \sf\longmapsto 1

Hence provee

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