Question

ПОМОГИТЕЕЕЕЕЕЕЕЕЕЕ СРОЧНО !!!!!!!!!!

Answer 1

держи
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Answer 2

sin⁴a + sin²a * cos²a - sin²a + 1 = sin²a (sin²a + cos²a) - sin²a + 1 = sin²a - sin²a + 1 = 1

cos²a = 1 - $frac{25}{169}$

cosa = $sqrt{ frac{144}{169}} = frac{12}{13}$

tga = $frac{5*13}{13*12} = frac{5}{12}$