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3 votes
3 votes
Trigonometric identities

Trigonometric identities-example-1
User Lenka Weiss
by
2.8k points

1 Answer

22 votes
22 votes

Without knowing what Juan's exact steps were, it's hard to say what he did wrong. The least you could say is that his solution is simply not correct.

4 sin²(θ) - 1 = 0

==> sin²(θ) = 1/4

==> sin(θ) = ±1/√2

==> θ = π/4, 3π/4, 5π/4, 7π/4

User Willjay
by
3.0k points
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