Question

sin square 20 + sin square 70​

Answer 1

$<font color=red><marquee behavior=alternate>Solution</marquee></font>$

$\sin {}^{2} (20) + \sin {}^{2} (70) \\ = \sin {}^{2} (20) + \cos {}^{2} (90 - 70) \\ = \sin {}^{2} (20) + \cos {}^{2} (20) \\ = 1$

Answer 2

Answer:

1

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