Exact value of tan²(π/16) + tan²(3π/16) + tan²(5π/16) + tan²(7π/16)
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tan²(π/16) + tan²(3π/16) + tan²(5π/16) + tan²(7π/16)
=tan²(π/16+3π/16+5π/16+7π/16)
=tan²(16π/16)
=tan²π
=(0)²
=0
=tan²(π/16+3π/16+5π/16+7π/16)
=tan²(16π/16)
=tan²π
=(0)²
=0
Anonymous:
can we take tan² common??
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