Grade 11Trigonometry
What will be the formulae of trigonometric function Sin square (a+b)
What will be the formulae of trigonometric function Sin square (a+b)
1 Answer
Arun
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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