what is the formula for cos (c+d) and cos (c-d)
Answers
Answered by
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cos(c+d)=cosc.cosd-sinc.sind. cos( c-d)=cosc.cosd+sinc.sind
Answered by
7
Step-by-step explanation:
To find : What is the formula for cos (c+d) and cos (c-d) ?
Solution :
We know by trigonometric identities,
Substitute, A=c and B=d,
Another one,
Substitute, A=c and B=d
#Learn more
What are the formulas [ not in syllabus just curious ] :
sin2A
cos2A
tan(A+B)
sin(A+B)
cos(A+B)
What is factorial of a number ?
What is binomial theorem ?
https://brainly.in/question/7311952
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