if cos9B=SinB then what is the value of cot5B?
Answers
Answered by
1
if the question is:sinA+sinB=α and cosA+cosB=β then, write the value of tan(
2
A+B
) ?
ANSWER
β
α
=
2cos(
2
A+B
).cos(
2
A−B
)
2sin(
2
A+B
).cos(
2
A−B
)
β
α
=tan(
2
A+B
)
Answered by
3
Answer:
B= 10 degree
Step-by-step explanation:
Cos9B =SinB
By using, Cos (90-B)=SinB
So, Cos(99B)= Sin(90-9B)
So, Sin(90-9B)=SinB
So, 90-9B=B,
B=10
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