Question

senokot 30 degree cos B equal to 90 degree what is the value of a + b​

Answer 1

Answer:

Let f(x)=cosAcosB

Given A+B=90

o

f(x)=cosAcos(90

o

−A), f(x)=cosAsinA=

2

sin2A

max. value of f(x)=

2

1

min. value of f(x)=−

2

1

Range of f(x)∈[−

2

1

,

2

1

]