Question

sin sguare21+sin square69

Answer 1

= sin square 21 + cos square 21
=1

Answer 2

hello!

#ur Ans
_________

${ \sin}^{2} 21 + {sin}^{2} 69 \\ \\ = > we \: know \: that \\ \\ sin(90 - x) = cosx \\ \\ now \\ \\ = > sin {}^{2} 21 + sin {}^{2} (90 - 69) \\ \\ = > sin {}^{2} 21 + cos {}^{2} 21 \\ \\ = > 1 \: ans$


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