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What will be the formulae of trigonometric function Sin square (a+b)

What will be the formulae of trigonometric function Sin square (a+b)

Grade:11

1 Answers

Arun
25763 Points
3 years ago
Dear student
 
sin² (a+b) = (sina cosb + cosa sinb)²
 
 = sin²a cos²b + cos²a sin²b + 2 sina sinb cosa cosb
= sin²a - sin²a sin²b + sin²b - sin²a sin²b + 2 sina sinb cosa cosb
 = sin²a + sin²b - 2 sin²a sin²b + 2 sina sinb cos a cosb

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