Grade 11Trigonometry
what is the value of cos^A(3-4cos^A)^+sin^A(3-4sin^A)^
what is the value of cos^A(3-4cos^A)^+sin^A(3-4sin^A)^
1 Answer
Arun
Approved Tutor Answer8 Years agoDear student
When opwning bracket, it becomes-
3 cos A - 4 cos³A + 3 sinA - 4 sin³A
= Cos 3A + sin3A
Regards
Arun
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