Question

Is sin a is equal to 3 upon 4, calculate cos a and 10 a​

Answer 1

Step-by-step explanation:

sina =perpendicular /hypotenuse

cos a =base/hypotenuse

tan a = perpendicular/ base

now, sin a =3/4

which means perpendicular = 3

and hypotenuse = 4

according to Pythagoras theorem ,

H^2 =P^2 +B^2

(4)^2 = (3)^2 + B^2

16 =9 +B^2

16-9 = B^2

7 = B^2

√7 =B

so, cos a = √7 /4

tan a = 3/√7