Question

if sin theta = 8/17 and tan alpha = 15/8 then find cos (theta+alpha)​

Answer 1

Answer:

write question

Step-by-step explanation:

but I don't know

sorry

Answer 2

Answer:

23/17

Step-by-step explanation:

(sec)2alpha=1+(tan)2 alpha

=1+(15/8)2

=1+225/64

=289/64

sec alpha =17/8

cos alpha =8/17

agen ,

(cos)2theta =1-(sin)2 theta

=1-64/289

=225/289

(cos) theta =15/17

cos theta+ cos alpha =15/17+8/17 =23/17