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Find the value of $$ {\sqrt{(cos^{2}20°+cos^{2}70°)}}$$
5Q:
Find the value of $$ {\sqrt{(cos^{2}20°+cos^{2}70°)}}$$
- 10false
- 2$$ {2\over{\sqrt{3}}}$$false
- 31true
- 4$$ {\sqrt{3}\over2}$$false
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