3077 views

1 Answers

cosec(90°-θ)=secθ=2 আবার,  secθ=1/cosθ তাহলে, 1/cosθ=2 অতএব, cosθ=1/2

3077 views

Related Questions

a+b=9,a-b=7 হলে ab = কত?
1 Answers 2808 Views