Question

Given that cos A = 5/13 and angle A is acute,find the value of 2 tan A + 3 sin A

Answer 1

Answer:

In this way:

(Without further information about the angle A, I assume that that angle is in the first quadrant)

sinA=√1−cos2A=√1−25169=√169−25169=

=√144169=1213,

and

tanA=sinAcosA=1213513=1213⋅135=125.

Answer 2

Hi,

I hope it helps you,