Math, asked by Aylinshantal15, 5 months ago

ayuda en estas porfavor

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Answered by biligiri
1

Step-by-step explanation:

5) [√1+sinx + √1-sinx]²/ 1+cosx

=> [1+sinx + 1-sinxx+ 2(√1+sinx)(√1-sinx)]/1+cosx

=> [2+2(√1-sin²x)]/1+cosx

=> 2+2cosx/ 1+cosx

=> 2(1+cosx)/(1+cosx)

=> 2 Answer option B

4) sin⁴x - cos⁴x - 1

=> (sin²x)² - (cos²x)² - 1

=> (sin²x + cos²x)(sin²x - cos²x) - 1

=> (1)(1-cos²x - cos²x) - 1

=> 1 - 2cos²x - 1

=> - 2cos²x Answer Option B

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