Sin ^{2} 35+cos ^{2} θ=1, then θ=ldots ldots ldots ldots

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8. Introduction to Trigonometry

easy

$\sin ^{2} 35+\cos ^{2} \theta=1,$ then $\theta=\ldots \ldots \ldots \ldots$

A

$35$

B

$55$

C

$70$

D

$20$

Solution

Comparing $\sin ^{2} 35+\cos ^{2} \theta=1$ with $\sin ^{2} \theta+\cos ^{2} \theta=1,$ we get $\theta=35$

Standard 10

Mathematics

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