Question

Please answer the questions​

Answer 1

Step-by-step explanation:

1st answer is option 1

if theeta is 30°,then

3sin30-4sin³30

3(1/2)-4(1/2)³

3/2-4(1/8)

3/2-1/2

4/2

2

2nd answer is option 3

according to the formula of sin²A+cos²A = 1

then sin²5°+cos²5° is also 1

3rd answer option is 3

angle A is 75°

angle B is 30°

angle A - angle B = 45°

tan45° = 1

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