Question

sina+cosa=26/19 then sina-cosa=?​

Answer 1

Step-by-step explanation:

sinx - cosx)² = sin²x + cos²x - 2sinxcosx = 49/169

=> 1 - 2sinxcosx = 49/169 => 2sinxcosx = 120/169

Now,(sinx + cosx)² = 1 + 2sinxcosx = 289/169

sinx + cosx = √(289/169) = ±17/13

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